diff --git a/tests/trace/test_call_object.py b/tests/trace/test_call_object.py
new file mode 100644
index 000000000000..50ca71cde3e6
--- /dev/null
+++ b/tests/trace/test_call_object.py
@@ -0,0 +1,26 @@
+import weave
+
+
+def test_call_to_dict(client):
+    @weave.op
+    def greet(name: str, age: int) -> str:
+        return f"Hello {name}, you are {age}!"
+    
+    _, call = greet.call("Alice", 30)
+    assert call.to_dict() == {
+        "op_name": call.op_name,
+        "display_name": call.display_name,
+        "inputs": call.inputs,
+        "output": call.output,
+        "exception": call.exception,
+        "summary": call.summary,
+        "attributes": call.attributes,
+        "started_at": call.started_at,
+        "ended_at": call.ended_at,
+        "deleted_at": call.deleted_at,
+        "id": call.id,
+        "parent_id": call.parent_id,
+        "trace_id": call.trace_id,
+        "project_id": call.project_id,
+    }
+
diff --git a/weave/trace/weave_client.py b/weave/trace/weave_client.py
index 7d3c4d070f7e..708c2543a1d4 100644
--- a/weave/trace/weave_client.py
+++ b/weave/trace/weave_client.py
@@ -15,6 +15,7 @@
     Callable,
     Generic,
     Protocol,
+    TypedDict,
     TypeVar,
     cast,
     overload,
@@ -336,6 +337,23 @@ def map_to_refs(obj: Any) -> Any:
     return obj
 
 
+class CallDict(TypedDict):
+    op_name: str
+    trace_id: str
+    project_id: str
+    parent_id: str | None
+    inputs: dict
+    id: str | None
+    output: Any
+    exception: str | None
+    summary: dict | None
+    display_name: str | None
+    attributes: dict | None
+    started_at: datetime.datetime | None
+    ended_at: datetime.datetime | None
+    deleted_at: datetime.datetime | None
+
+
 @dataclasses.dataclass
 class Call:
     """A Call represents a single operation that was executed as part of a trace."""
@@ -534,12 +552,16 @@ class ApplyScorerSuccess:
             wc._send_score_call(self, score_call, scorer_ref_uri)
         return apply_scorer_result
 
-    def to_dict(self) -> dict:
-        d = {k: v for k, v in dataclasses.asdict(self).items() if not k.startswith("_")}
+    def to_dict(self) -> CallDict:
+        d = {}
+        for field in dataclasses.fields(self):
+            if field.name.startswith("_"):
+                continue
+            d[field.name] = getattr(self, field.name)
         d["op_name"] = self.op_name
         d["display_name"] = self.display_name
 
-        return d
+        return cast(CallDict, d)
 
 
 def make_client_call(