The only daughter of James Fox and Mary Elizabeth Piper, she has four brothers, including the actors Laurence and Jack Fox. Her father"s parents were the theatrical agent Robin Fox and the actress Angela Worthington, for whom Noël Coward wrote the song "Don"t Put Your Daughter on the Stage, Mrs Worthington".
Fox was educated at the University of Cambridge. While there, in 2001 she played Juliet in a Marlowe Society production of Romeo and Juliet, opposite Tom Hiddleston, to be reviewed as "a slightly nonchalant Juliet". Garth Marenghi"s Darkplace (2004) Rick"s wife
AD/British Columbia: A Rock Opera (2004) Wise man
Someone Else (2006) Matt"s girl
Holby City, episode Blood Ties (2007) Paloma Duncan
Lilies (2007) Marianne Parks
The Information Technology Crowd The Work Outing (2007) Laura
Secret Diary of a Call Girl (2007) Estate agent
Submarine (2010) Mission Dutton
The Double (2013) Invigilator.
