diff --git a/libs/agno/agno/media.py b/libs/agno/agno/media.py
index 5e1273acf..6a00046d5 100644
--- a/libs/agno/agno/media.py
+++ b/libs/agno/agno/media.py
@@ -66,13 +66,14 @@ def validate_exclusive_video(cls, data: Any):
     def to_dict(self) -> Dict[str, Any]:
         import base64
 
-        return {
+        response_dict = {
             "content": base64.b64encode(self.content).decode("utf-8")
             if isinstance(self.content, bytes)
             else self.content,
             "filepath": self.filepath,
             "format": self.format,
         }
+        return {k: v for k, v in response_dict.items() if v is not None}
 
 
 class Audio(BaseModel):
@@ -113,13 +114,14 @@ def audio_url_content(self) -> Optional[bytes]:
     def to_dict(self) -> Dict[str, Any]:
         import base64
 
-        return {
+        response_dict = {
             "content": base64.b64encode(self.content).decode("utf-8")
             if isinstance(self.content, bytes)
             else self.content,
             "filepath": self.filepath,
             "format": self.format,
         }
+        return {k: v for k, v in response_dict.items() if v is not None}
 
 
 class AudioOutput(BaseModel):
@@ -131,7 +133,7 @@ class AudioOutput(BaseModel):
     def to_dict(self) -> Dict[str, Any]:
         import base64
 
-        return {
+        response_dict = {
             "id": self.id,
             "content": base64.b64encode(self.content).decode("utf-8")
             if isinstance(self.content, bytes)
@@ -139,6 +141,7 @@ def to_dict(self) -> Dict[str, Any]:
             "expires_at": self.expires_at,
             "transcript": self.transcript,
         }
+        return {k: v for k, v in response_dict.items() if v is not None}
 
 
 class Image(BaseModel):
@@ -183,7 +186,7 @@ def validate_exclusive_image(cls, data: Any):
     def to_dict(self) -> Dict[str, Any]:
         import base64
 
-        return {
+        response_dict = {
             "content": base64.b64encode(self.content).decode("utf-8")
             if isinstance(self.content, bytes)
             else self.content,
@@ -191,3 +194,4 @@ def to_dict(self) -> Dict[str, Any]:
             "url": self.url,
             "detail": self.detail,
         }
+        return {k: v for k, v in response_dict.items() if v is not None}
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