- Both of her parents were scientists.
- Auditioned for a place at the Royal Academy of Dramatic Art (RADA) in 1998, but did not get in.
- Specialized in the First World War at university.
- Added her grandfather's name, Maxwell, to her last name to distinguish herself from someone else with the same name when she joined Equity, the trade union for actors.
- Appeared in the original 2003 production of His Dark Materials, opposite Timothy Dalton and Dominic Cooper, at the National Theatre in London.
- Starred in the 2006 West End production of Cabaret as Sally Bowles.
- Played Regan, opposite Simon Russell Beale, in the Sam Mendes-directed 2014 production of King Lear.