diff --git a/doc/api/next_api_changes/deprecations/22123-TH.rst b/doc/api/next_api_changes/deprecations/22123-TH.rst
new file mode 100644
index 000000000000..5b65ac760bd6
--- /dev/null
+++ b/doc/api/next_api_changes/deprecations/22123-TH.rst
@@ -0,0 +1,4 @@
+``Axes.get_window_extent`` and ``Figure.get_window_extent`` won't accept parameters other than *renderer* anymore
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+This aligns the API with the general `.Artist.get_window_extent` API.
+All parameters were ignored anyway.
diff --git a/lib/matplotlib/axes/_base.py b/lib/matplotlib/axes/_base.py
index f54e8fd9a500..6a289ad65be4 100644
--- a/lib/matplotlib/axes/_base.py
+++ b/lib/matplotlib/axes/_base.py
@@ -719,7 +719,9 @@ def __repr__(self):
             fields += [f"ylabel={self.get_ylabel()!r}"]
         return f"<{self.__class__.__name__}:" + ", ".join(fields) + ">"
 
-    def get_window_extent(self, *args, **kwargs):
+    @_api.delete_parameter("3.6", "args")
+    @_api.delete_parameter("3.6", "kwargs")
+    def get_window_extent(self, renderer=None, *args, **kwargs):
         """
         Return the Axes bounding box in display space; *args* and *kwargs*
         are empty.
diff --git a/lib/matplotlib/figure.py b/lib/matplotlib/figure.py
index fb57acec9f1a..e53fc27ba95f 100644
--- a/lib/matplotlib/figure.py
+++ b/lib/matplotlib/figure.py
@@ -316,7 +316,9 @@ def contains(self, mouseevent):
         inside = self.bbox.contains(mouseevent.x, mouseevent.y)
         return inside, {}
 
-    def get_window_extent(self, *args, **kwargs):
+    @_api.delete_parameter("3.6", "args")
+    @_api.delete_parameter("3.6", "kwargs")
+    def get_window_extent(self, renderer=None, *args, **kwargs):
         # docstring inherited
         return self.bbox