diff --git a/temporalio/client.py b/temporalio/client.py
index 770a51392..593cef4a4 100644
--- a/temporalio/client.py
+++ b/temporalio/client.py
@@ -3147,6 +3147,17 @@ class WorkflowExecutionStatus(IntEnum):
         temporalio.api.enums.v1.WorkflowExecutionStatus.WORKFLOW_EXECUTION_STATUS_TIMED_OUT
     )
 
+    @property
+    def to_pascal_case(self) -> str:
+        """Convert WorkflowExecutionStatus enum name to Temporal search attribute format.
+
+        Returns:
+            Formatted string for ExecutionStatus search attribute
+        """
+        # Convert "TIMED_OUT" -> "TimedOut", "CONTINUED_AS_NEW" -> "ContinuedAsNew", etc.
+        return "".join(word.capitalize() for word in self.name.split("_"))
+
+
 
 @dataclass
 class WorkflowExecutionCount:
diff --git a/tests/test_client.py b/tests/test_client.py
index 63dec2810..d2fa0a689 100644
--- a/tests/test_client.py
+++ b/tests/test_client.py
@@ -410,6 +410,26 @@ async def test_query_rejected(client: Client, worker: ExternalWorker):
     assert err.value.status == WorkflowExecutionStatus.COMPLETED
 
 
+def test_workflow_execution_status_search_attribute_value():
+    """Test that WorkflowExecutionStatus.to_pascal_case converts to PascalCase correctly."""
+    test_cases = [
+        (WorkflowExecutionStatus.RUNNING, "Running"),
+        (WorkflowExecutionStatus.COMPLETED, "Completed"),
+        (WorkflowExecutionStatus.FAILED, "Failed"),
+        (WorkflowExecutionStatus.CANCELED, "Canceled"),
+        (WorkflowExecutionStatus.TERMINATED, "Terminated"),
+        (WorkflowExecutionStatus.TIMED_OUT, "TimedOut"),
+        (WorkflowExecutionStatus.CONTINUED_AS_NEW, "ContinuedAsNew"),
+    ]
+    
+    for status, expected in test_cases:
+        actual = status.to_pascal_case
+        assert actual == expected, (
+            f"WorkflowExecutionStatus.{status.name}.to_pascal_case "
+            f"returned '{actual}', expected '{expected}'"
+        )
+
+
 async def test_signal(client: Client, worker: ExternalWorker):
     handle = await client.start_workflow(
         "kitchen_sink",