diff --git a/pyrogram/types/messages_and_media/reaction.py b/pyrogram/types/messages_and_media/reaction.py
index 83dda582..9d6b9e24 100644
--- a/pyrogram/types/messages_and_media/reaction.py
+++ b/pyrogram/types/messages_and_media/reaction.py
@@ -16,7 +16,10 @@
 #  You should have received a copy of the GNU Lesser General Public License
 #  along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.
 
+from typing import Optional
+
 import pyrogram
+from pyrogram import raw
 from ..object import Object
 
 
@@ -24,26 +27,53 @@ class Reaction(Object):
     """Contains information about a reaction.
 
     Parameters:
-        emoji (``str``):
+        emoji (``str``, *optional*):
             Reaction emoji.
 
-        count (``int``):
-            Reaction count.
+        custom_emoji_id (``int``, *optional*):
+            Custom emoji id.
 
-        chosen (``bool``):
-            Whether this is the chosen reaction.
+        count (``int``, *optional*):
+            Reaction count.
     """
 
     def __init__(
         self,
         *,
         client: "pyrogram.Client" = None,
-        emoji: str,
-        count: int,
-        chosen: bool
+        emoji: Optional[str] = None,
+        custom_emoji_id: Optional[int] = None,
+        count: Optional[int] = None
     ):
         super().__init__(client)
 
         self.emoji = emoji
+        self.custom_emoji_id = custom_emoji_id
         self.count = count
-        self.chosen = chosen
+
+    @staticmethod
+    def _parse(
+        client: "pyrogram.Client",
+        reaction: "raw.base.Reaction"
+    ) -> "Reaction":
+        if isinstance(reaction, raw.types.ReactionEmoji):
+            return Reaction(
+                client=client,
+                emoji=reaction.emoticon
+            )
+
+        if isinstance(reaction, raw.types.ReactionCustomEmoji):
+            return Reaction(
+                client=client,
+                custom_emoji_id=reaction.document_id
+            )
+
+    @staticmethod
+    def _parse_count(
+        client: "pyrogram.Client",
+        reaction_count: "raw.base.ReactionCount"
+    ) -> "Reaction":
+        reaction = Reaction._parse(client, reaction_count.reaction)
+        reaction.count = reaction_count.count
+
+        return reaction