diff --git a/native/chat/chat-item-height-measurer.react.js b/native/chat/chat-item-height-measurer.react.js
--- a/native/chat/chat-item-height-measurer.react.js
+++ b/native/chat/chat-item-height-measurer.react.js
@@ -93,6 +93,7 @@
           endsCluster: item.endsCluster,
           threadCreatedFromMessage: item.threadCreatedFromMessage,
           pendingUploads,
+          reactions: item.reactions,
           ...sizes,
         };
       }
@@ -117,6 +118,7 @@
           endsCluster: item.endsCluster,
           threadCreatedFromMessage: item.threadCreatedFromMessage,
           contentHeight: height,
+          reactions: item.reactions,
         };
       } else {
         invariant(
@@ -134,6 +136,7 @@
           threadCreatedFromMessage: item.threadCreatedFromMessage,
           robotext: item.robotext,
           contentHeight: height,
+          reactions: item.reactions,
         };
       }
     },
diff --git a/native/types/chat-types.js b/native/types/chat-types.js
--- a/native/types/chat-types.js
+++ b/native/types/chat-types.js
@@ -3,6 +3,7 @@
 import type {
   LocalMessageInfo,
   MultimediaMessageInfo,
+  ReactionMessageInfo,
   RobotextMessageInfo,
 } from 'lib/types/message-types';
 import type { TextMessageInfo } from 'lib/types/messages/text';
@@ -21,6 +22,7 @@
   +robotext: string,
   +threadCreatedFromMessage: ?ThreadInfo,
   +contentHeight: number,
+  +reactions?: $ReadOnlyArray<ReactionMessageInfo>,
 };
 
 export type ChatTextMessageInfoItemWithHeight = {
@@ -34,6 +36,7 @@
   +endsCluster: boolean,
   +contentHeight: number,
   +threadCreatedFromMessage: ?ThreadInfo,
+  +reactions?: $ReadOnlyArray<ReactionMessageInfo>,
 };
 
 export type MultimediaContentSizes = {
@@ -53,6 +56,7 @@
   +endsCluster: boolean,
   +threadCreatedFromMessage: ?ThreadInfo,
   +pendingUploads: ?MessagePendingUploads,
+  +reactions?: $ReadOnlyArray<ReactionMessageInfo>,
 };
 
 export type ChatMessageInfoItemWithHeight =