David Tennant will narrate Shrek: Once Upon A Time which is a 60-minute documentary about the four animated Shrek movies.
It will be shown on BBC3 on 23rd December at 9pm and repeated that evening at 12.55am also on BBC Three.
This programme includes interviews with the movie creators, as well as the stars who lent their voices to the movies including Mike Myers, Cameron Diaz, Antonio Banderas and Jennifer Saunders.
