diff --git a/CHANGELOG.md b/CHANGELOG.md
index 29979d022..bfc925208 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## [next]
+
+- fix: `Tooltip` now correctly uses constructor-given style ((#1321)[https://github.com/bdlukaa/fluent_ui/pull/1321))
+
 ## 4.15.1
 
 - fix: `NavigationView` auto display mode no longer shows a brief overlay when resizing from minimal to compact mode ([#1316](https://github.com/bdlukaa/fluent_ui/pull/1316))
diff --git a/lib/src/controls/flyouts/tooltip.dart b/lib/src/controls/flyouts/tooltip.dart
index 0952ddc6d..d45d63474 100644
--- a/lib/src/controls/flyouts/tooltip.dart
+++ b/lib/src/controls/flyouts/tooltip.dart
@@ -305,7 +305,15 @@ class TooltipState extends State<Tooltip> with SingleTickerProviderStateMixin {
   void didChangeDependencies() {
     super.didChangeDependencies();
     _visible = TooltipVisibility.of(context);
-    _tooltipTheme = TooltipTheme.of(context);
+    _cacheTooltipTheme(context);
+  }
+
+  @override
+  void didUpdateWidget(Tooltip oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.style != widget.style) {
+      _cacheTooltipTheme(context);
+    }
   }
 
   void _handleStatusChanged(AnimationStatus status) {
@@ -438,9 +446,6 @@ class TooltipState extends State<Tooltip> with SingleTickerProviderStateMixin {
       );
     }
 
-    // Merge widget style with cached theme
-    final tooltipTheme = _tooltipTheme.merge(widget.style);
-
     // Compute default decoration based on current theme
     final theme = FluentTheme.of(context);
     final defaultTextStyle = theme.typography.body!;
@@ -457,19 +462,19 @@ class TooltipState extends State<Tooltip> with SingleTickerProviderStateMixin {
       textDirection: Directionality.of(context),
       child: _TooltipOverlay(
         richMessage: widget.richMessage ?? TextSpan(text: widget.message),
-        padding: tooltipTheme.padding ?? EdgeInsetsDirectional.zero,
-        margin: tooltipTheme.margin ?? _defaultMargin,
-        decoration: tooltipTheme.decoration ?? defaultDecoration,
-        textStyle: tooltipTheme.textStyle ?? defaultTextStyle,
+        padding: _tooltipTheme.padding ?? EdgeInsetsDirectional.zero,
+        margin: _tooltipTheme.margin ?? _defaultMargin,
+        decoration: _tooltipTheme.decoration ?? defaultDecoration,
+        textStyle: _tooltipTheme.textStyle ?? defaultTextStyle,
         animation: CurvedAnimation(
           parent: _controller,
           curve: Curves.fastOutSlowIn,
         ),
         target: target,
-        verticalOffset: tooltipTheme.verticalOffset ?? _defaultVerticalOffset,
-        preferBelow: tooltipTheme.preferBelow ?? _defaultPreferBelow,
+        verticalOffset: _tooltipTheme.verticalOffset ?? _defaultVerticalOffset,
+        preferBelow: _tooltipTheme.preferBelow ?? _defaultPreferBelow,
         displayHorizontally: widget.displayHorizontally,
-        maxWidth: tooltipTheme.maxWidth,
+        maxWidth: _tooltipTheme.maxWidth,
       ),
     );
     _entry = OverlayEntry(builder: (_) => overlay);
@@ -545,6 +550,10 @@ class TooltipState extends State<Tooltip> with SingleTickerProviderStateMixin {
     }
   }
 
+  void _cacheTooltipTheme(BuildContext context) {
+    _tooltipTheme = TooltipTheme.of(context).merge(widget.style);
+  }
+
   @override
   Widget build(BuildContext context) {
     // If message is empty then no need to create a tooltip overlay to show
diff --git a/test/tooltip_test.dart b/test/tooltip_test.dart
index 9edfff90c..80dd7a69f 100644
--- a/test/tooltip_test.dart
+++ b/test/tooltip_test.dart
@@ -67,6 +67,46 @@ void main() {
     expect(find.text('Test Tooltip'), findsNothing);
   });
 
+  testWidgets('Tooltip honors style waitDuration on hover', (tester) async {
+    await tester.pumpWidget(
+      wrapApp(
+        child: const ScaffoldPage(
+          content: Center(
+            child: Tooltip(
+              message: 'Styled delay tooltip',
+              style: TooltipThemeData(waitDuration: Duration(seconds: 10)),
+              child: Button(
+                key: Key('StyledDelayButton'),
+                onPressed: null,
+                child: Text('Hover Me'),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    expect(find.text('Styled delay tooltip'), findsNothing);
+
+    final gesture = await tester.createGesture(
+      kind: PointerDeviceKind.mouse,
+      pointer: 1,
+    );
+    await gesture.addPointer(location: Offset.zero);
+    await tester.pump();
+
+    await gesture.moveTo(
+      tester.getCenter(find.byKey(const Key('StyledDelayButton'))),
+    );
+    await tester.pump();
+
+    await tester.pump(const Duration(milliseconds: 9999));
+    expect(find.text('Styled delay tooltip'), findsNothing);
+
+    await tester.pump(const Duration(milliseconds: 1));
+    expect(find.text('Styled delay tooltip'), findsOneWidget);
+  });
+
   testWidgets('Tooltip dismisses when clicking outside', (tester) async {
     await tester.pumpWidget(
       wrapApp(