She is the daughter of Peter Hall and Maria Ewing.
Attended Roedean School in East Sussex, where she was head girl. Then studied English at Cambridge University, but dropped out after her second year.
She is the sister of theatre director Edward Hall.
She contributed a doodle for Epilepsy Action's National Doodle Day on Friday 23 February 2007.
She is the sister of theater set designer Lucy Hall.
Her favorite film is Woody Allen's 1979 movie, Manhattan (1979).
For her professional stage debut in "Mrs Warren's Profession" (dir. Peter Hall), she won the 2002 Sunday Times/ National Theatre Ian Charleson Award which recognises performances in classical roles for actors and actresses under 30 in Britain. She was nominated for the same award in 2004 for her performance in "As You Like It" (dir. Peter Hall).