diff --git a/web/modals/chat/message-reactions-modal.css b/web/modals/chat/message-reactions-modal.css
--- a/web/modals/chat/message-reactions-modal.css
+++ b/web/modals/chat/message-reactions-modal.css
@@ -14,3 +14,13 @@
   flex-direction: row;
   justify-content: space-between;
 }
+
+div.userInfoContainer {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+}
+
+div.username {
+  margin-left: 8px;
+}
diff --git a/web/modals/chat/message-reactions-modal.react.js b/web/modals/chat/message-reactions-modal.react.js
--- a/web/modals/chat/message-reactions-modal.react.js
+++ b/web/modals/chat/message-reactions-modal.react.js
@@ -6,6 +6,7 @@
 import { useMessageReactionsList } from 'lib/shared/reaction-utils.js';
 
 import css from './message-reactions-modal.css';
+import UserAvatar from '../../components/user-avatar.react.js';
 import Modal from '../modal.react.js';
 
 type Props = {
@@ -22,7 +23,10 @@
     () =>
       messageReactionsList.map(messageReactionUser => (
         <div key={messageReactionUser.id} className={css.userRowContainer}>
-          <div>{messageReactionUser.username}</div>
+          <div className={css.userInfoContainer}>
+            <UserAvatar size="small" userID={messageReactionUser.id} />
+            <div className={css.username}>{messageReactionUser.username}</div>
+          </div>
           <div>{messageReactionUser.reaction}</div>
         </div>
       )),