diff --git a/web/modals/chat/message-reactions-modal.css b/web/modals/chat/message-reactions-modal.css
new file mode 100644
--- /dev/null
+++ b/web/modals/chat/message-reactions-modal.css
@@ -0,0 +1,16 @@
+div.modalContentContainer {
+  padding: 24px 32px 32px 32px;
+  color: var(--fg);
+  background-color: var(--modal-bg);
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+  font-size: var(--l-font-18);
+  gap: 16px;
+}
+
+div.userRowContainer {
+  display: flex;
+  flex-direction: row;
+  justify-content: space-between;
+}
diff --git a/web/modals/chat/message-reactions-modal.react.js b/web/modals/chat/message-reactions-modal.react.js
new file mode 100644
--- /dev/null
+++ b/web/modals/chat/message-reactions-modal.react.js
@@ -0,0 +1,69 @@
+// @flow
+
+import _sortBy from 'lodash/fp/sortBy';
+import * as React from 'react';
+
+import type { MessageReactionInfo } from 'lib/selectors/chat-selectors';
+import { stringForUserExplicit } from 'lib/shared/user-utils';
+
+import Modal from '../modal.react';
+import css from './message-reactions-modal.css';
+
+type MessageReactionListInfo = {
+  +id: string,
+  +isViewer: boolean,
+  +reaction: string,
+  +username: string,
+};
+
+type Props = {
+  +onClose: () => void,
+  +reactions: $ReadOnlyMap<string, MessageReactionInfo>,
+};
+
+function MessageReactionsModal(props: Props): React.Node {
+  const { onClose, reactions } = props;
+
+  const reactionsList = React.useMemo(() => {
+    const result = [];
+
+    for (const [reaction, reactionInfo] of reactions) {
+      reactionInfo.users.forEach(user => {
+        result.push({
+          ...user,
+          username: stringForUserExplicit(user),
+          reaction,
+        });
+      });
+    }
+
+    const sortedResult = _sortBy(
+      ([
+        (reactionInfo: MessageReactionListInfo) => {
+          const numOfReactions = reactions.get(reactionInfo.reaction)?.users
+            .length;
+
+          return numOfReactions ? -numOfReactions : 0;
+        },
+        'username',
+      ]: $ReadOnlyArray<
+        ((reactionInfo: MessageReactionListInfo) => mixed) | string,
+      >),
+    )(result);
+
+    return sortedResult.map(messageReactionUser => (
+      <div key={messageReactionUser.id} className={css.userRowContainer}>
+        <div>{messageReactionUser.username}</div>
+        <div>{messageReactionUser.reaction}</div>
+      </div>
+    ));
+  }, [reactions]);
+
+  return (
+    <Modal size="large" name="Reactions" onClose={onClose}>
+      <div className={css.modalContentContainer}>{reactionsList}</div>
+    </Modal>
+  );
+}
+
+export default MessageReactionsModal;