diff --git a/__tests__/functions/generate-issue.ts b/__tests__/functions/generate-issue.ts
index 0198c42c..08c4fbb5 100644
--- a/__tests__/functions/generate-issue.ts
+++ b/__tests__/functions/generate-issue.ts
@@ -15,7 +15,8 @@ export function generateIssue(
   isClosed = false,
   isLocked = false,
   milestone: string | undefined = undefined,
-  assignees: string[] = []
+  assignees: string[] = [],
+  userLogin: string | undefined = undefined
 ): Issue {
   return new Issue(options, {
     number: id,
@@ -39,6 +40,10 @@ export function generateIssue(
         login: assignee,
         type: 'User'
       };
-    })
+    }),
+    user: {
+      login: userLogin ? userLogin : 'dummy-test-user',
+      type: 'User'
+    }  
   });
 }
diff --git a/__tests__/main.spec.ts b/__tests__/main.spec.ts
index 80d660e8..4814d675 100644
--- a/__tests__/main.spec.ts
+++ b/__tests__/main.spec.ts
@@ -6,6 +6,7 @@ import {IssuesProcessorMock} from './classes/issues-processor-mock';
 import {DefaultProcessorOptions} from './constants/default-processor-options';
 import {generateIssue} from './functions/generate-issue';
 import {alwaysFalseStateMock} from './classes/state-mock';
+import {isPullRequest} from '../src/functions/is-pull-request';
 
 test('processing an issue with no label will make it stale and close it, if it is old enough only if days-before-close is set to 0', async () => {
   const opts: IIssuesProcessorOptions = {
@@ -2743,3 +2744,103 @@ test('processing an issue with the "includeOnlyAssigned" option set and no assig
   expect(processor.staleIssues).toHaveLength(0);
   expect(processor.closedIssues).toHaveLength(0);
 });
+
+test('interpolate stale message on prs when there is placeholder', async () => {
+  const opts = {...DefaultProcessorOptions};
+  opts.daysBeforeStale = 5; // stale after 5 days
+  opts.daysBeforeClose = 20; // closes after 25 days
+  opts.stalePrMessage = 'Hello {author}, Please take care of this pr!';
+  const lastUpdate = new Date();
+  lastUpdate.setDate(lastUpdate.getDate() - 10);
+  const loginUser = 'dummy-user';
+  const TestIssueList: Issue[] = [
+    generateIssue(
+      opts,
+      1,
+      'An issue that should be marked stale but not closed.',
+      lastUpdate.toString(),
+      lastUpdate.toString(),
+      true,
+      [],
+      false,
+      false,
+      undefined,
+      [],
+      loginUser
+    )
+  ];
+  const processor = new IssuesProcessorMock(
+    opts,
+    async p => (p === 1 ? TestIssueList : []),
+    async () => [],
+    async () => new Date().toDateString()
+  );
+
+  // for sake of testing, mocking private function
+  const markSpy = jest.spyOn(processor as any, '_markStale');
+
+  await processor.processIssues(1);
+
+  // issue should be staled
+  expect(processor.closedIssues).toHaveLength(0);
+  expect(processor.removedLabelIssues).toHaveLength(0);
+  expect(processor.staleIssues).toHaveLength(1);
+
+  // comment should be created with placeholder replaced.
+  expect(markSpy).toHaveBeenCalledWith(
+    TestIssueList[0],
+    'Hello @dummy-user, Please take care of this pr!',
+    opts.stalePrLabel,
+    false
+  );
+});
+
+test('interpolate stale message on issues when there is placeholder', async () => {
+  const opts = {...DefaultProcessorOptions};
+  opts.daysBeforeStale = 5; // stale after 5 days
+  opts.daysBeforeClose = 20; // closes after 25 days
+  opts.staleIssueMessage = 'Hello {author}, Please take care of this issue!';
+  const lastUpdate = new Date();
+  lastUpdate.setDate(lastUpdate.getDate() - 10);
+  const loginUser = 'dummy-user';
+  const TestIssueList: Issue[] = [
+    generateIssue(
+      opts,
+      1,
+      'An issue that should be marked stale but not closed',
+      lastUpdate.toString(),
+      lastUpdate.toString(),
+      false,
+      [],
+      false,
+      false,
+      undefined,
+      [],
+      loginUser
+    )
+  ];
+  const processor = new IssuesProcessorMock(
+    opts,
+    async p => (p === 1 ? TestIssueList : []),
+    async () => [],
+    async () => new Date().toDateString()
+  );
+
+  // for sake of testing, mocking private function
+  const markSpy = jest.spyOn(processor as any, '_markStale');
+
+  await processor.processIssues(1);
+
+  // issue should be staled
+  expect(processor.closedIssues).toHaveLength(0);
+  expect(processor.removedLabelIssues).toHaveLength(0);
+  expect(processor.staleIssues).toHaveLength(1);
+
+  // comment should be created with placeholder replaced.
+  expect(markSpy).toHaveBeenCalledWith(
+    TestIssueList[0],
+    'Hello @dummy-user, Please take care of this issue!',
+    opts.staleIssueLabel,
+    false
+  );
+});
diff --git a/src/classes/issue.ts b/src/classes/issue.ts
index b9063183..e1025724 100644
--- a/src/classes/issue.ts
+++ b/src/classes/issue.ts
@@ -7,6 +7,7 @@ import {ILabel} from '../interfaces/label';
 import {IMilestone} from '../interfaces/milestone';
 import {IsoDateString} from '../types/iso-date-string';
 import {Operations} from './operations';
+import {IUser} from '../interfaces/user';
 
 export class Issue implements IIssue {
   readonly title: string;
@@ -24,6 +25,7 @@ export class Issue implements IIssue {
   markedStaleThisRun: boolean;
   operations = new Operations();
   private readonly _options: IIssuesProcessorOptions;
+  readonly user?: IUser | null;
 
   constructor(
     options: Readonly<IIssuesProcessorOptions>,
@@ -43,6 +45,7 @@ export class Issue implements IIssue {
     this.assignees = issue.assignees || [];
     this.isStale = isLabeled(this, this.staleLabel);
     this.markedStaleThisRun = false;
+    this.user = issue.user
   }
 
   get isPullRequest(): boolean {
diff --git a/src/classes/issues-processor.ts b/src/classes/issues-processor.ts
index 486c6a78..998cd6b2 100644
--- a/src/classes/issues-processor.ts
+++ b/src/classes/issues-processor.ts
@@ -212,12 +212,18 @@ export class IssuesProcessor {
     );
 
     // calculate string based messages for this issue
-    const staleMessage: string = issue.isPullRequest
-      ? this.options.stalePrMessage
-      : this.options.staleIssueMessage;
-    const closeMessage: string = issue.isPullRequest
-      ? this.options.closePrMessage
-      : this.options.closeIssueMessage;
+    const staleMessage: string = this._interpolatePlaceholders(
+      issue,
+      issue.isPullRequest
+        ? this.options.stalePrMessage
+        : this.options.staleIssueMessage
+      );
+    const closeMessage: string = this._interpolatePlaceholders(
+      issue,
+      issue.isPullRequest
+        ? this.options.closePrMessage
+        : this.options.closeIssueMessage
+      );
     const staleLabel: string = issue.isPullRequest
       ? this.options.stalePrLabel
       : this.options.staleIssueLabel;
@@ -1286,4 +1292,10 @@ export class IssuesProcessor {
 
     return Option.RemoveStaleWhenUpdated;
   }
+
+  private _interpolatePlaceholders(issue: Issue, message: string) {
+    return issue.user
+      ? message.replace('{author}', `@${issue.user?.login}`)
+      : message;
+  }
 }
diff --git a/src/interfaces/issue.ts b/src/interfaces/issue.ts
index defdb75d..67d2b5f4 100644
--- a/src/interfaces/issue.ts
+++ b/src/interfaces/issue.ts
@@ -1,20 +1,22 @@
-import {IsoDateString} from '../types/iso-date-string';
-import {Assignee} from './assignee';
-import {ILabel} from './label';
-import {IMilestone} from './milestone';
-import {components} from '@octokit/openapi-types';
-export interface IIssue {
-  title: string;
-  number: number;
-  created_at: IsoDateString;
-  updated_at: IsoDateString;
-  draft: boolean;
-  labels: ILabel[];
-  pull_request?: object | null;
-  state: string;
-  locked: boolean;
-  milestone?: IMilestone | null;
-  assignees?: Assignee[] | null;
-}
-
-export type OctokitIssue = components['schemas']['issue'];
+import {IsoDateString} from '../types/iso-date-string';
+import {Assignee} from './assignee';
+import {ILabel} from './label';
+import {IMilestone} from './milestone';
+import {components} from '@octokit/openapi-types';
+import {IUser} from './user';
+
+export interface IIssue {
+  title: string;
+  number: number;
+  created_at: IsoDateString;
+  updated_at: IsoDateString;
+  labels: ILabel[];
+  pull_request?: object | null;
+  state: string;
+  locked: boolean;
+  milestone?: IMilestone | null;
+  assignees?: Assignee[] | null;
+  user?: IUser | null;
+}
+
+export type OctokitIssue = components['schemas']['issue'];
diff --git a/src/interfaces/user.ts b/src/interfaces/user.ts
index 4e454f6d..31980428 100644
--- a/src/interfaces/user.ts
+++ b/src/interfaces/user.ts
@@ -1,4 +1,8 @@
+import {components} from '@octokit/openapi-types';
+
 export interface IUser {
   type: string | 'User';
   login: string;
 }
+
+export type OctokitUser = components['schemas']['nullable-simple-user'];