Is there a TimePicker control in WPF (.NET 4)?

Checkout the Extended WPF Toolkit DateTimeUpDown on Codeplex (or related SO post).

WPF 4.0 doesn't provide a DateTimePicker out of the box.

Updated I'm used the Extended WPF Toolkit http://wpftoolkit.codeplex.com/ in an recent project it includes a nice DateTimePicker Control - http://wpftoolkit.codeplex.com/wikipage?title=DateTimePicker&referringTitle=Home.