diff --git a/src/Avalonia.Themes.Fluent/Controls/TimePicker.xaml b/src/Avalonia.Themes.Fluent/Controls/TimePicker.xaml
index 27e52fa152..28544638d1 100644
--- a/src/Avalonia.Themes.Fluent/Controls/TimePicker.xaml
+++ b/src/Avalonia.Themes.Fluent/Controls/TimePicker.xaml
@@ -203,6 +203,11 @@
                 MaxHeight="398">
           <Grid Name="ContentPanel" RowDefinitions="*,Auto">
             <Grid Name="PART_PickerContainer">
+              <Grid.Styles>
+                <Style Selector="DateTimePickerPanel > ListBoxItem">
+                  <Setter Property="Theme" Value="{StaticResource FluentDateTimePickerItem}" />
+                </Style>
+              </Grid.Styles>
               <!--Ignore col defs here, set in code-->
               <Panel Name="PART_HourHost" Grid.Column="0">
                 <ScrollViewer HorizontalScrollBarVisibility="Disabled"
diff --git a/src/Avalonia.Themes.Simple/Controls/TimePicker.xaml b/src/Avalonia.Themes.Simple/Controls/TimePicker.xaml
index 3a5e9ec1b1..aed297fba2 100644
--- a/src/Avalonia.Themes.Simple/Controls/TimePicker.xaml
+++ b/src/Avalonia.Themes.Simple/Controls/TimePicker.xaml
@@ -219,6 +219,11 @@
           <Grid Name="ContentPanel"
                 RowDefinitions="*,Auto">
             <Grid Name="PART_PickerContainer">
+              <Grid.Styles>
+                <Style Selector="DateTimePickerPanel > ListBoxItem">
+                  <Setter Property="Theme" Value="{StaticResource SimpleDateTimePickerItem}" />
+                </Style>
+              </Grid.Styles>
               <!--  Ignore col defs here, set in code  -->
               <Panel Name="PART_HourHost"
                      Grid.Column="0">