[3] Whitehead began working on films with Aardman Animations in 2003.
[2] In 2009, he voiced Wallace in Wallace & Gromit's Grand Adventures,[4] a four-part, episodic, adventure game by Telltale Games.
[5] Following Peter Sallis' last work as Wallace in 2010,[6][7] Whitehead became the official voice of the character beginning with Wallace & Gromit's Musical Marvels, Prom 20 of the 2012 season of the BBC Proms.
Whitehead has performed in Great Scott!, an Antarctic epic touring comedy from Gonzo Moose.
He performed a one-man show at The London Horror Festival and voiced the title role in Golem (Young Vic and tour), produced by multi award-winning theatre company 1927, directed by Suzanne Andrade and Paul Barritt.