diff --git a/airflow-core/src/airflow/timetables/base.py b/airflow-core/src/airflow/timetables/base.py
index b1ade1e888ea2..f53f6010f980f 100644
--- a/airflow-core/src/airflow/timetables/base.py
+++ b/airflow-core/src/airflow/timetables/base.py
@@ -143,8 +143,8 @@ class DagRunInfo(NamedTuple):
     data_interval: DataInterval | None
     """The data interval this DagRun to operate over."""
 
-    partition_date: DateTime | None
-    partition_key: str | None
+    partition_date: DateTime | None = None
+    partition_key: str | None = None
 
     @classmethod
     def exact(cls, at: DateTime) -> DagRunInfo:
diff --git a/airflow-core/tests/unit/timetables/test_trigger_timetable.py b/airflow-core/tests/unit/timetables/test_trigger_timetable.py
index 114080685ca5a..ca6ada9dfb251 100644
--- a/airflow-core/tests/unit/timetables/test_trigger_timetable.py
+++ b/airflow-core/tests/unit/timetables/test_trigger_timetable.py
@@ -834,3 +834,19 @@ def test_generate_run_id_without_partition_key() -> None:
         data_interval=None,
     )
     assert run_id.startswith("manual__2025-06-07T08:09:00+00:00__")
+
+
+def test_dagruninfo_backward_compatibility() -> None:
+    start = pendulum.datetime(2025, 1, 1, tz="UTC")
+    end = pendulum.datetime(2025, 1, 2, tz="UTC")
+
+    info = DagRunInfo(
+        run_after=end,
+        data_interval=DataInterval(
+            start=start,
+            end=end,
+        ),
+    )
+
+    assert info.partition_date is None
+    assert info.partition_key is None