Or Barty Crouch on Star Wars! whichever you prefer.
David Tennant is a Star Wars fan! He will play a character on Cartoon Network's Clone Wars.
The Doctor Who fave will play an ancient droid called Huyang, a servant in the Jedi Order.
Love that large-eyed, vulnerable look he has. Tennant, not Huyang. Though Huyang's pretty hot for a decrepit metal schoolteacher.
IGN.com has the story, and even better, an exclusive clip from the cartoon.