David Tennant webchat

New Doctor goes online to answer your questions.

It's going to be a busy afternoon for David Tennant. Not only is the Tenth Doctor materialising in the Blue Peter studio to reveal the winner of their Monster Competition, he'll follow that with a 30-minute CBBC webchat.

If you'd like to quiz David about anything and everything Who-related (although we doubt you'll get too many spoilers out of him), you can follow the link below and send in your questions.

The chat kicks off at 5.30pm, straight after Blue Peter.