diff --git a/autogen/agentchat/conversable_agent.py b/autogen/agentchat/conversable_agent.py
index f1fadcca27..131f043038 100644
--- a/autogen/agentchat/conversable_agent.py
+++ b/autogen/agentchat/conversable_agent.py
@@ -1024,6 +1024,20 @@ def _raise_exception_on_async_reply_functions(self) -> None:
 
             raise RuntimeError(msg)
 
+    def _get_related_agents_for_usage(self) -> List[Agent]:
+        """Gets all agents related to this agent so they can be used in the usage summary.
+
+        In ConversableAgent, this is only itself, but this can be overridden in other Agent classes to add additional agents, such as for
+        the agents in a group chat when self is the GroupChatManager."""
+
+        return [self]
+
+    @staticmethod
+    def _get_agents_for_usage_summary(sender: "ConversableAgent", recipient: "ConversableAgent") -> List[Agent]:
+        """Gets all agents for a chat session in order to calculate the usage summary."""
+
+        return list(set(sender._get_related_agents_for_usage() + recipient._get_related_agents_for_usage()))
+
     def initiate_chat(
         self,
         recipient: "ConversableAgent",
@@ -1162,7 +1176,7 @@ def my_message(sender: ConversableAgent, recipient: ConversableAgent, context: d
         chat_result = ChatResult(
             chat_history=self.chat_messages[recipient],
             summary=summary,
-            cost=gather_usage_summary([self, recipient]),
+            cost=gather_usage_summary(ConversableAgent._get_agents_for_usage_summary(self, recipient)),
             human_input=self._human_input,
         )
         return chat_result
@@ -1228,7 +1242,7 @@ async def a_initiate_chat(
         chat_result = ChatResult(
             chat_history=self.chat_messages[recipient],
             summary=summary,
-            cost=gather_usage_summary([self, recipient]),
+            cost=gather_usage_summary(ConversableAgent._get_agents_for_usage_summary(self, recipient)),
             human_input=self._human_input,
         )
         return chat_result
diff --git a/autogen/agentchat/groupchat.py b/autogen/agentchat/groupchat.py
index 0e14bf35f8..0d32de74ef 100644
--- a/autogen/agentchat/groupchat.py
+++ b/autogen/agentchat/groupchat.py
@@ -1666,3 +1666,12 @@ def clear_agents_history(self, reply: dict, groupchat: GroupChat) -> str:
         reply_content = " ".join(words[:clear_word_index] + words[clear_word_index + skip_words_number :])
 
         return reply_content
+
+    def _get_related_agents_for_usage(self) -> List[Agent]:
+        """Gets all agents in the groupchat in order to calculate the usage summary.
+
+        This overrides the ConversableAgent method to include groupchat agents.
+
+        TODO: Persist and include the speaker selection agent from the auto speaker selection mode."""
+
+        return [self] + self._groupchat.agents