diff --git a/openmetadata-ui/src/main/resources/ui/playwright/e2e/Features/ActivityFeed.spec.ts b/openmetadata-ui/src/main/resources/ui/playwright/e2e/Features/ActivityFeed.spec.ts
index 4dcc3330578..0c751f81a62 100644
--- a/openmetadata-ui/src/main/resources/ui/playwright/e2e/Features/ActivityFeed.spec.ts
+++ b/openmetadata-ui/src/main/resources/ui/playwright/e2e/Features/ActivityFeed.spec.ts
@@ -565,6 +565,76 @@ test.describe('Activity feed', () => {
     );
   });
 
+  test('User 1 mentions user 2 and user 2 sees correct usernames in feed replies', async ({
+    browser,
+  }) => {
+    const { page: page1, afterAction: afterActionUser1 } =
+      await performUserLogin(browser, adminUser);
+    const { page: page2, afterAction: afterActionUser2 } =
+      await performUserLogin(browser, user2);
+
+    await test.step('User 1 mentions user 2 in a feed reply', async () => {
+      // Add mention comment in feed mentioning user2
+      await addMentionCommentInFeed(page1, user2.responseData.name);
+
+      await page1.locator('[data-testid="closeDrawer"]').click();
+
+      await afterActionUser1();
+    });
+
+    await test.step('User 2 logs in and checks @Mentions tab', async () => {
+      await redirectToHomePage(page2);
+      await page2.waitForLoadState('networkidle');
+
+      const fetchMentionsFeedResponse = page2.waitForResponse(
+        '/api/v1/feed?filterType=MENTIONS&userId=*'
+      );
+      await page2
+        .locator('[data-testid="activity-feed-widget"]')
+        .locator('text=@Mentions')
+        .click();
+
+      await fetchMentionsFeedResponse;
+
+      // Verify the mention appears in the feed
+      await expect(
+        page2.locator('[data-testid="message-container"]').first()
+      ).toBeVisible();
+
+      // Click on the feed to open replies
+      await page2.locator('[data-testid="reply-count"]').first().click();
+
+      await page2.waitForSelector('.ant-drawer-content', {
+        state: 'visible',
+      });
+
+      // Verify the feed reply card shows correct usernames
+      await expect(
+        page2.locator('[data-testid="feed-reply-card"]').first()
+      ).toBeVisible();
+
+      // Check that the reply shows the correct username (user1 who made the mention)
+      await expect(
+        page2
+          .locator('[data-testid="feed-reply-card"] .reply-card-user-name')
+          .first()
+      ).toContainText(adminUser.responseData.displayName);
+
+      // Check that the mention text contains user2's name
+      await expect(
+        page2
+          .locator(
+            '[data-testid="feed-replies"] [data-testid="markdown-parser"]'
+          )
+          .first()
+      ).toContainText(`@${user2.responseData.name}`);
+
+      await page2.locator('[data-testid="closeDrawer"]').click();
+
+      await afterActionUser2();
+    });
+  });
+
   test('Check Task Filter in Landing Page Widget', async ({ browser }) => {
     const { page: page1, afterAction: afterActionUser1 } =
       await performUserLogin(browser, user1);
diff --git a/openmetadata-ui/src/main/resources/ui/src/components/ActivityFeed/ActivityFeedCardNew/CommentCard.component.tsx b/openmetadata-ui/src/main/resources/ui/src/components/ActivityFeed/ActivityFeedCardNew/CommentCard.component.tsx
index 1d23af41c12..d6aa6a7a038 100644
--- a/openmetadata-ui/src/main/resources/ui/src/components/ActivityFeed/ActivityFeedCardNew/CommentCard.component.tsx
+++ b/openmetadata-ui/src/main/resources/ui/src/components/ActivityFeed/ActivityFeedCardNew/CommentCard.component.tsx
@@ -81,7 +81,7 @@ const CommentCard = ({
 
   const [, , user] = useUserProfile({
     permission: true,
-    name: feed.updatedBy ?? '',
+    name: post.from ?? '',
   });
 
   const onEditPost = () => {
@@ -138,19 +138,19 @@ const CommentCard = ({
       onMouseEnter={() => setIsHovered(true)}
       onMouseLeave={() => setIsHovered(false)}>
       <div className="profile-picture m-r-xs">
-        <UserPopOverCard userName={feed.updatedBy ?? ''}>
+        <UserPopOverCard userName={post.from ?? ''}>
           <div className="d-flex items-center">
-            <ProfilePicture key={feed.id} name={feed.updatedBy!} width="32" />
+            <ProfilePicture key={post.id} name={post.from ?? ''} width="32" />
           </div>
         </UserPopOverCard>
       </div>
       <div className="w-full">
         <div className="d-flex items-center gap-2 flex-wrap">
           <Typography.Text className="activity-feed-user-name reply-card-user-name">
-            <UserPopOverCard userName={feed.updatedBy ?? ''}>
+            <UserPopOverCard userName={post.from ?? ''}>
               <Link
                 className="reply-card-user-name"
-                to={getUserPath(feed.updatedBy ?? '')}>
+                to={getUserPath(post.from ?? '')}>
                 {getEntityName(user)}
               </Link>
             </UserPopOverCard>