diff --git a/lms/djangoapps/discussion/rest_api/tests/test_utils.py b/lms/djangoapps/discussion/rest_api/tests/test_utils.py
index 655e786702..ef02b474cd 100644
--- a/lms/djangoapps/discussion/rest_api/tests/test_utils.py
+++ b/lms/djangoapps/discussion/rest_api/tests/test_utils.py
@@ -240,7 +240,7 @@ class TestSendResponseNotifications(ForumsEnableMixin, CommentsServiceMockMixin,
         expected_context = {
             'replier_name': self.user_3.username,
             'post_title': self.thread.title,
-            'author_name': 'dummy',
+            'author_name': 'dummy\'s',
             'course_name': self.course.display_name,
         }
         self.assertDictEqual(args_comment.context, expected_context)
@@ -311,6 +311,36 @@ class TestSendResponseNotifications(ForumsEnableMixin, CommentsServiceMockMixin,
         self.assertEqual(args_comment.app_name, 'discussion')
 
 
+class TestSendCommentNotification(ForumsEnableMixin, CommentsServiceMockMixin, ModuleStoreTestCase):
+    """
+    Test case to send new_comment notification
+    """
+    def setUp(self):
+        super().setUp()
+        httpretty.reset()
+        httpretty.enable()
+
+        self.course = CourseFactory.create()
+        self.user_1 = UserFactory.create()
+        self.user_2 = UserFactory.create()
+
+    def test_new_comment_notification(self):
+        handler = Mock()
+        USER_NOTIFICATION_REQUESTED.connect(handler)
+
+        thread = ThreadMock(thread_id=1, creator=self.user_1, title='test thread')
+        response = ThreadMock(thread_id=2, creator=self.user_2, title='test response')
+        self.register_get_comment_response({
+            'id': response.id,
+            'thread_id': 'abc',
+            'user_id': response.user_id
+        })
+        send_response_notifications(thread, self.course, self.user_2, parent_id=response.id)
+        handler.assert_called_once()
+        context = handler.call_args[1]['notification_data'].context
+        self.assertEqual(context['author_name'], 'their')
+
+
 @ddt.ddt
 class TestBlackoutDates(ForumsEnableMixin, CommentsServiceMockMixin, ModuleStoreTestCase):
     """
diff --git a/lms/djangoapps/discussion/rest_api/utils.py b/lms/djangoapps/discussion/rest_api/utils.py
index 26904c9f45..8ec6eeb987 100644
--- a/lms/djangoapps/discussion/rest_api/utils.py
+++ b/lms/djangoapps/discussion/rest_api/utils.py
@@ -9,6 +9,7 @@ from django.conf import settings
 from django.contrib.auth.models import User  # lint-amnesty, pylint: disable=imported-auth-user
 from django.core.paginator import Paginator
 from django.db.models.functions import Length
+from django.utils.translation import gettext_lazy as _
 
 from common.djangoapps.student.models import CourseEnrollment
 from common.djangoapps.student.roles import CourseStaffRole, CourseInstructorRole
@@ -502,19 +503,32 @@ class DiscussionNotificationSender:
         """
         return int(self.parent_response.user_id) == int(self.thread.user_id)
 
+    def _response_and_comment_has_same_creator(self):
+        return int(self.parent_response.attributes['user_id']) == self.creator.id
+
     def send_new_comment_notification(self):
         """
         Send notification to parent thread creator i.e. comment on the response.
         """
-        #
         if (
             self.parent_response and
             self.creator.id != int(self.thread.user_id)
         ):
             # use your if author of response is same as author of post.
-            author_name = "your" if self._response_and_thread_has_same_creator() else self.parent_response.username
+            # use 'their' if comment author is also response author.
+            author_name = (
+                # Translators: Replier commented on "your" response to your post
+                _("your")
+                if self._response_and_thread_has_same_creator()
+                else (
+                    # Translators: Replier commented on "their" response to your post
+                    _("their")
+                    if self._response_and_comment_has_same_creator()
+                    else f"{self.parent_response.username}'s"
+                )
+            )
             context = {
-                "author_name": author_name,
+                "author_name": str(author_name),
             }
             self._send_notification([self.thread.user_id], "new_comment", extra_context=context)
 
diff --git a/openedx/core/djangoapps/notifications/base_notification.py b/openedx/core/djangoapps/notifications/base_notification.py
index fb5350dae6..ec3018c007 100644
--- a/openedx/core/djangoapps/notifications/base_notification.py
+++ b/openedx/core/djangoapps/notifications/base_notification.py
@@ -25,7 +25,7 @@ COURSE_NOTIFICATION_TYPES = {
         'notification_app': 'discussion',
         'name': 'new_comment',
         'is_core': True,
-        'content_template': _('<{p}><{strong}>{replier_name}</{strong}> commented on <{strong}>{author_name}\'s'
+        'content_template': _('<{p}><{strong}>{replier_name}</{strong}> commented on <{strong}>{author_name}'
                               '</{strong}> response to your post <{strong}>{post_title}</{strong}></{p}>'),
         'content_context': {
             'post_title': 'Post title',