diff --git a/src/google/adk/models/interactions_utils.py b/src/google/adk/models/interactions_utils.py
index 501a30ab..8f832b3a 100644
--- a/src/google/adk/models/interactions_utils.py
+++ b/src/google/adk/models/interactions_utils.py
@@ -630,6 +630,7 @@ def _convert_interaction_step_to_parts(step: Step) -> list[types.Part]:
         types.Part(
             function_response=types.FunctionResponse(
                 id=step.call_id or '',
+                name=step.name,
                 response=_function_result_to_response(step.result),
             )
         )
@@ -1003,6 +1004,7 @@ def _handle_function_result(
   part = types.Part(
       function_response=types.FunctionResponse(
           id=delta.call_id or '',
+          name=delta.name,
           response=_function_result_to_response(delta.result),
       )
   )
diff --git a/tests/unittests/models/test_interactions_utils.py b/tests/unittests/models/test_interactions_utils.py
index 890e9852..24cc492f 100644
--- a/tests/unittests/models/test_interactions_utils.py
+++ b/tests/unittests/models/test_interactions_utils.py
@@ -824,11 +824,13 @@ class TestConvertInteractionOutputToParts:
     output = FunctionResultStep(
         type='function_result',
         call_id='call_123',
+        name='get_weather',
         result={'weather': 'Sunny'},
     )
     result_list = interactions_utils._convert_interaction_step_to_parts(output)
     result = result_list[0] if result_list else None
     assert result.function_response.id == 'call_123'
+    assert result.function_response.name == 'get_weather'
     assert result.function_response.response == {'weather': 'Sunny'}
 
   def test_function_result_output_preserves_none_values(self):
@@ -1468,6 +1470,7 @@ class TestConvertInteractionEventToLlmResponse:
         delta={
             'type': 'function_result',
             'call_id': 'call_9',
+            'name': 'get_temperature',
             'result': {'temp': 72},
         },
     )
@@ -1478,6 +1481,7 @@ class TestConvertInteractionEventToLlmResponse:
     assert result is not None
     part = result.content.parts[0]
     assert part.function_response.id == 'call_9'
+    assert part.function_response.name == 'get_temperature'
     assert part.function_response.response == {'temp': 72}
     assert len(state.parts) == 1