Anna's role in Bleak House earned her the Best Actress award at the 2006 BAFTA TV awards.
The rising star previously appeared in two of the most popular dramas of the decade.
In 2004, she played Bessie Higgins in North & South, voted top drama of the year by visitors to the BBC Drama website.
In 2005, she guested in an episode of the new Doctor Who series called The Long Game.
She's also appeared in the films The Hours and Enduring Love, the stage production of His Dark Materials, and played Daphne Manners in Radio 4's adaptation of The Jewel In The Crown.
