professional debut in The Storm at Shakespeare's Globe in 2005. She has since worked in film, television, radio and theatre. In 2007 she stood in at short notice for an unwell Carey Mulligan in the Royal Court's production of The Seagull, and appeared in a fundraising play at the Almeida Theatre.
Whittaker's radio credits include a 2008 adaptation of Blinded by the Sun by Stephen Poliakoff, which also starred Harriet Walter and Alex Jennings and the role of Lydia Bennett in Unseen Austen an original drama by Judith French.
She appears in the film The Kid. In 2009 she worked on the film Ollie Kepler's Expanding Purple World and the BBC2 drama Royal Wedding. She also co-starred in BBC1's Accused which was aired on 6 December 2010.
Whittaker appeared in Ian Fitzgibbon's 2009 Irish comedy crime film Perrier's Bounty, alongside Cillian Murphy and Jim Broadbent.
She appears as Viv in the 2011 BBC adaptation of Sarah Waters' novel The Night Watch.