diff --git a/telethon/events/__init__.py b/telethon/events/__init__.py
index 233fc94a..821930a6 100644
--- a/telethon/events/__init__.py
+++ b/telethon/events/__init__.py
@@ -607,6 +607,7 @@ class ChatAction(_EventBuilder):
             self.created = bool(created)
             self._user_peers = users if isinstance(users, list) else [users]
             self._users = None
+            self._input_users = None
             self.new_title = new_title
 
         @property
@@ -665,6 +666,16 @@ class ChatAction(_EventBuilder):
             except (StopIteration, TypeError):
                 return None
 
+        @property
+        def input_user(self):
+            """
+            Input version of the self.user property.
+            """
+            try:
+                return next(self.input_users)
+            except (StopIteration, TypeError):
+                return None
+
         @property
         def users(self):
             """
@@ -681,6 +692,22 @@ class ChatAction(_EventBuilder):
 
             return self._users
 
+        @property
+        def input_users(self):
+            """
+            Input version of the self.users property.
+            """
+            if self._input_users is None and self._user_peers:
+                self._input_users = []
+                for peer in self._user_peers:
+                    try:
+                        self._input_users.append(self._client.get_input_entity(
+                            peer
+                        ))
+                    except (TypeError, ValueError):
+                        pass
+            return self._input_users
+
 
 class UserUpdate(_EventBuilder):
     """