diff --git a/lib/platform/azure/__snapshots__/index.spec.ts.snap b/lib/platform/azure/__snapshots__/index.spec.ts.snap
index 98bbf1fa1bcb8feccab6c7b814241c7bbaae84e6..1ed2c883db95266978d6df8e612cc72d8c0831d2 100644
--- a/lib/platform/azure/__snapshots__/index.spec.ts.snap
+++ b/lib/platform/azure/__snapshots__/index.spec.ts.snap
@@ -133,6 +133,7 @@ exports[`platform/azure getBranchPr(branchName) should return the pr 1`] = `null
 
 exports[`platform/azure getPr(prNo) should return a pr in the right format 1`] = `
 Object {
+  "hasReviewers": false,
   "isModified": false,
   "labels": Array [
     "renovate",
@@ -143,6 +144,7 @@ Object {
 
 exports[`platform/azure getPr(prNo) should return a pr thats been modified 1`] = `
 Object {
+  "hasReviewers": false,
   "isModified": true,
   "labels": Array [],
   "number": 1234,
diff --git a/lib/platform/azure/index.ts b/lib/platform/azure/index.ts
index 6f24dba0b317350e60a53f07f5533b53d1701870..98363e171039e7aa1a1880e9c6bf738d8daa9c8c 100644
--- a/lib/platform/azure/index.ts
+++ b/lib/platform/azure/index.ts
@@ -1,3 +1,4 @@
+import is from '@sindresorhus/is';
 import {
   GitPullRequest,
   GitPullRequestCommentThread,
@@ -262,7 +263,7 @@ export async function getPr(pullRequestId: number): Promise<Pr | null> {
   azurePr.isModified =
     commits.length > 0 &&
     commits[0].author.name !== commits[commits.length - 1].author.name;
-
+  azurePr.hasReviewers = is.nonEmptyArray(azurePr.reviewers);
   return azurePr;
 }
 
diff --git a/lib/platform/bitbucket-server/__snapshots__/index.spec.ts.snap b/lib/platform/bitbucket-server/__snapshots__/index.spec.ts.snap
index 075b9c5abe1258d77df62f0c8f4038d9a8767974..da572a96b8ddac59d14de8484684d1323d6ad1c4 100644
--- a/lib/platform/bitbucket-server/__snapshots__/index.spec.ts.snap
+++ b/lib/platform/bitbucket-server/__snapshots__/index.spec.ts.snap
@@ -1506,6 +1506,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
@@ -1957,6 +1958,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": true,
   "isStale": false,
@@ -1979,6 +1981,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
@@ -2001,6 +2004,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": true,
   "isStale": false,
@@ -2160,6 +2164,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
@@ -2245,6 +2250,7 @@ Object {
   "branchName": undefined,
   "createdAt": undefined,
   "displayNumber": "Pull Request #undefined",
+  "hasReviewers": false,
   "isModified": false,
   "isStale": false,
   "number": undefined,
@@ -5372,6 +5378,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
@@ -5823,6 +5830,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": true,
   "isStale": false,
@@ -5845,6 +5853,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
@@ -5867,6 +5876,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": true,
   "isStale": false,
@@ -6026,6 +6036,7 @@ Object {
   "canMerge": false,
   "createdAt": 1547853840016,
   "displayNumber": "Pull Request #5",
+  "hasReviewers": true,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
@@ -6111,6 +6122,7 @@ Object {
   "branchName": undefined,
   "createdAt": undefined,
   "displayNumber": "Pull Request #undefined",
+  "hasReviewers": false,
   "isModified": false,
   "isStale": false,
   "number": undefined,
diff --git a/lib/platform/bitbucket-server/index.ts b/lib/platform/bitbucket-server/index.ts
index 44cb2afb0160eb92213060c5cf6e3557a93de753..75c2e1bb98d22fe40ab413ec8a12bed8645eefcd 100644
--- a/lib/platform/bitbucket-server/index.ts
+++ b/lib/platform/bitbucket-server/index.ts
@@ -1,4 +1,5 @@
 import url, { URLSearchParams } from 'url';
+import is from '@sindresorhus/is';
 import delay from 'delay';
 import { RenovateConfig } from '../../config/common';
 import {
@@ -267,7 +268,7 @@ export async function getPr(
     reviewers: res.body.reviewers.map((r) => r.user.name),
     isModified: false,
   };
-
+  pr.hasReviewers = is.nonEmptyArray(pr.reviewers);
   pr.version = updatePrVersion(pr.number, pr.version);
 
   if (pr.state === PR_STATE_OPEN) {
diff --git a/lib/platform/bitbucket/__snapshots__/index.spec.ts.snap b/lib/platform/bitbucket/__snapshots__/index.spec.ts.snap
index 3c0b2ec7cf2d3e315fd21903c0a61946629cf720..994caf139a5934479fdd162514a5f93e4b1a76de 100644
--- a/lib/platform/bitbucket/__snapshots__/index.spec.ts.snap
+++ b/lib/platform/bitbucket/__snapshots__/index.spec.ts.snap
@@ -518,6 +518,7 @@ Object {
   "canMerge": true,
   "createdAt": "2018-07-02T07:02:25.275030+00:00",
   "displayNumber": "Pull Request #5",
+  "hasReviewers": false,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
@@ -919,6 +920,7 @@ Object {
   "canMerge": true,
   "createdAt": "2018-07-02T07:02:25.275030+00:00",
   "displayNumber": "Pull Request #3",
+  "hasReviewers": false,
   "isConflicted": false,
   "isModified": true,
   "isStale": false,
@@ -936,6 +938,7 @@ Object {
   "canMerge": true,
   "createdAt": "2018-07-02T07:02:25.275030+00:00",
   "displayNumber": "Pull Request #5",
+  "hasReviewers": false,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
@@ -953,6 +956,7 @@ Object {
   "canMerge": true,
   "createdAt": "2018-07-02T07:02:25.275030+00:00",
   "displayNumber": "Pull Request #5",
+  "hasReviewers": false,
   "isConflicted": false,
   "isModified": true,
   "isStale": false,
@@ -1082,6 +1086,7 @@ Object {
   "canMerge": true,
   "createdAt": "2018-07-02T07:02:25.275030+00:00",
   "displayNumber": "Pull Request #5",
+  "hasReviewers": false,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
diff --git a/lib/platform/bitbucket/index.ts b/lib/platform/bitbucket/index.ts
index bb16658f8ba4e997a70a362745ac43cfe15bca55..511efd04cd1a3d408be32379bd0d08d8932be0ee 100644
--- a/lib/platform/bitbucket/index.ts
+++ b/lib/platform/bitbucket/index.ts
@@ -1,4 +1,5 @@
 import URL from 'url';
+import is from '@sindresorhus/is';
 import addrs from 'email-addresses';
 import parseDiff from 'parse-diff';
 import { RenovateConfig } from '../../config/common';
@@ -327,6 +328,8 @@ export async function getPr(prNo: number): Promise<Pr | null> {
     res.isStale = await git.isBranchStale(pr.source.branch.name);
   }
 
+  res.hasReviewers = is.nonEmptyArray(pr.reviewers);
+
   return res;
 }
 
diff --git a/lib/platform/common.ts b/lib/platform/common.ts
index 97a2de0ed116544aafd0810ffe36568001027c2b..550e093cc4d2b9d93c36dd04c8b25a5fd41057b0 100644
--- a/lib/platform/common.ts
+++ b/lib/platform/common.ts
@@ -43,6 +43,8 @@ export interface Pr {
   canMergeReason?: string;
   createdAt?: string;
   displayNumber?: string;
+  hasAssignees?: boolean;
+  hasReviewers?: boolean;
   isConflicted?: boolean;
   isModified?: boolean;
   isStale?: boolean;
diff --git a/lib/platform/gitea/__snapshots__/index.spec.ts.snap b/lib/platform/gitea/__snapshots__/index.spec.ts.snap
index f165adbbd31e134aef424309e0fc1bea963f6cbf..0f6d04a8330d99f5d0b097995093dc90f4cedf46 100644
--- a/lib/platform/gitea/__snapshots__/index.spec.ts.snap
+++ b/lib/platform/gitea/__snapshots__/index.spec.ts.snap
@@ -7,6 +7,7 @@ Object {
   "canMerge": true,
   "createdAt": "2014-04-01T05:14:20Z",
   "displayNumber": "Pull Request #42",
+  "hasAssignees": false,
   "isConflicted": false,
   "isModified": undefined,
   "isStale": undefined,
@@ -26,6 +27,7 @@ Object {
   "canMerge": true,
   "createdAt": "2014-04-01T05:14:20Z",
   "displayNumber": "Pull Request #42",
+  "hasAssignees": false,
   "isConflicted": false,
   "isModified": undefined,
   "isStale": undefined,
@@ -45,6 +47,7 @@ Object {
   "canMerge": true,
   "createdAt": "2015-03-22T20:36:16Z",
   "displayNumber": "Pull Request #1",
+  "hasAssignees": false,
   "isConflicted": false,
   "isModified": true,
   "isStale": false,
@@ -64,6 +67,7 @@ Object {
   "canMerge": true,
   "createdAt": "2015-03-22T20:36:16Z",
   "displayNumber": "Pull Request #1",
+  "hasAssignees": false,
   "isConflicted": false,
   "isModified": false,
   "isStale": false,
@@ -84,6 +88,7 @@ Array [
     "canMerge": true,
     "createdAt": "2015-03-22T20:36:16Z",
     "displayNumber": "Pull Request #1",
+    "hasAssignees": false,
     "isConflicted": false,
     "isModified": undefined,
     "isStale": undefined,
@@ -100,6 +105,7 @@ Array [
     "canMerge": true,
     "createdAt": "2011-08-18T22:30:38Z",
     "displayNumber": "Pull Request #2",
+    "hasAssignees": false,
     "isConflicted": false,
     "isModified": undefined,
     "isStale": undefined,
diff --git a/lib/platform/gitea/gitea-helper.ts b/lib/platform/gitea/gitea-helper.ts
index 120220940d5306b650714892a8bfd8070a4eb891..756f7535aedff770dea22c441e87368bb5033711 100644
--- a/lib/platform/gitea/gitea-helper.ts
+++ b/lib/platform/gitea/gitea-helper.ts
@@ -33,6 +33,10 @@ export interface PR {
     sha: string;
     repo?: Repo;
   };
+  assignee?: {
+    login?: string;
+  };
+  assignees?: any[];
 }
 
 export interface Issue {
diff --git a/lib/platform/gitea/index.ts b/lib/platform/gitea/index.ts
index 7cccb5419b624dd6a1c669948a72ccc02e9a12c1..6211369c311a881947fa10c92f154a42e045d833 100644
--- a/lib/platform/gitea/index.ts
+++ b/lib/platform/gitea/index.ts
@@ -1,4 +1,5 @@
 import URL from 'url';
+import is from '@sindresorhus/is';
 import { configFileNames } from '../../config/app-strings';
 import { RenovateConfig } from '../../config/common';
 import {
@@ -104,6 +105,7 @@ function toRenovatePR(data: helper.PR): Pr | null {
     isConflicted: !data.mergeable,
     isStale: undefined,
     isModified: undefined,
+    hasAssignees: !!(data.assignee?.login || is.nonEmptyArray(data.assignees)),
   };
 }
 
diff --git a/lib/platform/github/__snapshots__/index.spec.ts.snap b/lib/platform/github/__snapshots__/index.spec.ts.snap
index 5a5c9415330c809726bdb19576bad464039efd68..28be1610335a76f0e567a990c1008a20def1fec6 100644
--- a/lib/platform/github/__snapshots__/index.spec.ts.snap
+++ b/lib/platform/github/__snapshots__/index.spec.ts.snap
@@ -1935,6 +1935,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -1975,6 +1978,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -1993,7 +1999,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -2200,6 +2206,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -2240,6 +2249,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -2258,7 +2270,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -2928,6 +2940,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -2968,6 +2983,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -2986,7 +3004,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -3057,6 +3075,8 @@ Object {
   "canMerge": false,
   "canMergeReason": "mergeStateStatus = DIRTY",
   "displayNumber": "Pull Request #2500",
+  "hasAssignees": false,
+  "hasReviewers": false,
   "isConflicted": true,
   "isModified": false,
   "isStale": true,
@@ -3114,6 +3134,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -3154,6 +3177,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -3172,7 +3198,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -3254,6 +3280,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -3294,6 +3323,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -3312,7 +3344,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -3443,6 +3475,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -3483,6 +3518,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -3501,7 +3539,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -3642,6 +3680,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -3682,6 +3723,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -3700,7 +3744,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -3842,6 +3886,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -3882,6 +3929,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -3900,7 +3950,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -4053,6 +4103,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -4093,6 +4146,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -4111,7 +4167,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -4264,6 +4320,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -4304,6 +4363,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -4322,7 +4384,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -4475,6 +4537,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -4515,6 +4580,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -4533,7 +4601,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -4686,6 +4754,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -4726,6 +4797,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -4744,7 +4818,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
@@ -4878,6 +4952,9 @@ Array [
               "first": "100",
             },
             "nodes": Object {
+              "assignees": Object {
+                "totalCount": null,
+              },
               "baseRefName": null,
               "body": null,
               "commits": Object {
@@ -4918,6 +4995,9 @@ Array [
               "mergeStateStatus": null,
               "mergeable": null,
               "number": null,
+              "reviewRequests": Object {
+                "totalCount": null,
+              },
               "reviews": Object {
                 "__args": Object {
                   "first": "1",
@@ -4936,7 +5016,7 @@ Array [
       "accept": "application/vnd.github.merge-info-preview+json, application/vnd.github.v3+json",
       "accept-encoding": "gzip, deflate",
       "authorization": "token abc123",
-      "content-length": 1264,
+      "content-length": 1413,
       "content-type": "application/json",
       "host": "api.github.com",
       "user-agent": "https://github.com/renovatebot/renovate",
diff --git a/lib/platform/github/index.ts b/lib/platform/github/index.ts
index abd2a86dcb73aa4c18be282988ddeda48f347f58..12ceb01f4271cdae988dceafc5f81f7606a96581 100644
--- a/lib/platform/github/index.ts
+++ b/lib/platform/github/index.ts
@@ -600,6 +600,12 @@ async function getOpenPrs(): Promise<PrList> {
                   name
                 }
               }
+              assignees {
+                totalCount
+              }
+              reviewRequests {
+                totalCount
+              }
               commits(first: 2) {
                 nodes {
                   commit {
@@ -723,6 +729,10 @@ async function getOpenPrs(): Promise<PrList> {
             (label: { name: string }) => label.name
           );
         }
+        pr.hasAssignees = !!(pr.assignees?.totalCount > 0);
+        delete pr.assignees;
+        pr.hasReviewers = !!(pr.reviewRequests?.totalCount > 0);
+        delete pr.reviewRequests;
         delete pr.mergeable;
         delete pr.mergeStateStatus;
         delete pr.commits;
diff --git a/lib/platform/gitlab/__snapshots__/index.spec.ts.snap b/lib/platform/gitlab/__snapshots__/index.spec.ts.snap
index a9050579770071360702465cd379c5d1eadb2248..2ece084bd0707369c646f00454f97300bc05af7e 100644
--- a/lib/platform/gitlab/__snapshots__/index.spec.ts.snap
+++ b/lib/platform/gitlab/__snapshots__/index.spec.ts.snap
@@ -832,6 +832,8 @@ Object {
   "commits": 1,
   "deletions": 1,
   "displayNumber": "Merge Request #91",
+  "hasAssignees": false,
+  "hasReviewers": false,
   "iid": 91,
   "isConflicted": true,
   "isModified": true,
@@ -1171,6 +1173,8 @@ Object {
   "description": "a merge request",
   "displayNumber": "Merge Request #12345",
   "diverged_commits_count": 5,
+  "hasAssignees": false,
+  "hasReviewers": false,
   "id": 1,
   "iid": 12345,
   "isConflicted": true,
@@ -1220,6 +1224,8 @@ Object {
   "description": "a merge request",
   "displayNumber": "Merge Request #12345",
   "diverged_commits_count": 2,
+  "hasAssignees": true,
+  "hasReviewers": false,
   "id": 1,
   "iid": 12345,
   "isConflicted": true,
@@ -1269,6 +1275,8 @@ Object {
   "description": "a merge request",
   "displayNumber": "Merge Request #12345",
   "diverged_commits_count": 5,
+  "hasAssignees": true,
+  "hasReviewers": false,
   "id": 1,
   "iid": 12345,
   "isModified": true,
diff --git a/lib/platform/gitlab/index.spec.ts b/lib/platform/gitlab/index.spec.ts
index ad2e79ea10b7afff1c398a14af59a0c84d4bd067..a83433a44eacd87c04fb5c59d3d57c232a5f16bb 100644
--- a/lib/platform/gitlab/index.spec.ts
+++ b/lib/platform/gitlab/index.spec.ts
@@ -1079,11 +1079,13 @@ describe('platform/gitlab', () => {
           diverged_commits_count: 5,
           source_branch: 'some-branch',
           target_branch: 'master',
+          assignees: [],
         })
         .get('/api/v4/projects/undefined/repository/branches/some-branch')
         .reply(200, { commit: { author_email: global.gitAuthor.email } });
       const pr = await gitlab.getPr(12345);
       expect(pr).toMatchSnapshot();
+      expect(pr.hasAssignees).toBe(false);
       expect(httpMock.getTrace()).toMatchSnapshot();
     });
     it('returns the mergeable PR', async () => {
@@ -1100,6 +1102,9 @@ describe('platform/gitlab', () => {
           diverged_commits_count: 5,
           source_branch: 'some-branch',
           target_branch: 'master',
+          assignee: {
+            id: 1,
+          },
         })
         .get(
           '/api/v4/projects/some%2Frepo/repository/commits/0d9c7726c3d628b7e28af234595cfd20febdbf8e/statuses'
@@ -1109,6 +1114,7 @@ describe('platform/gitlab', () => {
         .reply(200, { commit: null });
       const pr = await gitlab.getPr(12345);
       expect(pr).toMatchSnapshot();
+      expect(pr.hasAssignees).toBe(true);
       expect(httpMock.getTrace()).toMatchSnapshot();
     });
     it('returns the PR with nonexisting branch', async () => {
@@ -1126,11 +1132,17 @@ describe('platform/gitlab', () => {
           diverged_commits_count: 2,
           source_branch: 'some-branch',
           target_branch: 'master',
+          assignees: [
+            {
+              id: 1,
+            },
+          ],
         })
         .get('/api/v4/projects/undefined/repository/branches/some-branch')
         .reply(404);
       const pr = await gitlab.getPr(12345);
       expect(pr).toMatchSnapshot();
+      expect(pr.hasAssignees).toBe(true);
       expect(httpMock.getTrace()).toMatchSnapshot();
     });
   });
diff --git a/lib/platform/gitlab/index.ts b/lib/platform/gitlab/index.ts
index 98f52c113e8c84305e5e3581d97f1520469c325c..9fc8ecc077f80e4ab435715208b0e0b68e1e45d1 100644
--- a/lib/platform/gitlab/index.ts
+++ b/lib/platform/gitlab/index.ts
@@ -442,6 +442,8 @@ export async function getPr(iid: number): Promise<Pr> {
         description: string;
         diverged_commits_count: number;
         merge_status: string;
+        assignee?: { id?: number };
+        assignees?: { id?: number }[];
       }
     >(url)
   ).body;
@@ -454,6 +456,10 @@ export async function getPr(iid: number): Promise<Pr> {
   pr.isStale = pr.diverged_commits_count > 0;
   pr.state = pr.state === 'opened' ? PR_STATE_OPEN : pr.state;
   pr.isModified = true;
+  pr.hasAssignees = !!(pr.assignee?.id || pr.assignees?.[0]?.id);
+  delete pr.assignee;
+  delete pr.assignees;
+  pr.hasReviewers = false;
   if (pr.merge_status === 'cannot_be_merged') {
     logger.debug('pr cannot be merged');
     pr.canMerge = false;
diff --git a/lib/workers/pr/index.ts b/lib/workers/pr/index.ts
index c50b153aa39f631f54116d248bb6f4b10024cb48..79f1e153b172386d286b1e139dd8f661c87a1b2e 100644
--- a/lib/workers/pr/index.ts
+++ b/lib/workers/pr/index.ts
@@ -282,7 +282,12 @@ export async function ensurePr(
     if (existingPr) {
       logger.debug('Processing existing PR');
       // istanbul ignore if
-      if (config.automerge && (await getBranchStatus()) === BranchStatus.red) {
+      if (
+        !existingPr.hasAssignees &&
+        !existingPr.hasReviewers &&
+        config.automerge &&
+        (await getBranchStatus()) === BranchStatus.red
+      ) {
         logger.debug(`Setting assignees and reviewers as status checks failed`);
         await addAssigneesReviewers(config, existingPr);
       }