diff --git a/packages/flutter/lib/src/material/dialog.dart b/packages/flutter/lib/src/material/dialog.dart
index 3d8336fc011..1659dad97a0 100644
--- a/packages/flutter/lib/src/material/dialog.dart
+++ b/packages/flutter/lib/src/material/dialog.dart
@@ -508,7 +508,8 @@ class AlertDialog extends StatelessWidget {
   /// Style for the text in the [title] of this [AlertDialog].
   ///
   /// If null, [DialogTheme.titleTextStyle] is used. If that's null, defaults to
-  /// [TextTheme.titleLarge] of [ThemeData.textTheme].
+  /// [TextTheme.headlineSmall] of [ThemeData.textTheme] if
+  /// [ThemeData.useMaterial3] is true, [TextTheme.titleLarge] otherwise.
   final TextStyle? titleTextStyle;
 
   /// The (optional) content of the dialog is displayed in the center of the
@@ -542,7 +543,8 @@ class AlertDialog extends StatelessWidget {
   /// Style for the text in the [content] of this [AlertDialog].
   ///
   /// If null, [DialogTheme.contentTextStyle] is used. If that's null, defaults
-  /// to [TextTheme.titleMedium] of [ThemeData.textTheme].
+  /// to [TextTheme.bodyMedium] of [ThemeData.textTheme] if
+  /// [ThemeData.useMaterial3] is true, [TextTheme.titleMedium] otherwise.
   final TextStyle? contentTextStyle;
 
   /// The (optional) set of actions that are displayed at the bottom of the