How do I add text inside a shape in XAML

In WPF XAML you could do something simple like this:

<Grid Width="60" Height="100">
    <Ellipse Fill="Yellow"/>
    <TextBlock VerticalAlignment="Center" HorizontalAlignment="Center" Text="Hello"/>
</Grid>

To get text in the centre of a yellow ellipse.

I'm guessing something that simple will work on WinRT.