She developed anorexia and had to be treated for four years.
She made her film debut while she was attending the University of Oxford.
She was born to actors Judy Loe and Richard Beckinsale. She had a daughter named Lily with actor Michael Sheen in 1999. She was married to Len Wiseman from 2004 to 2015. In June 2017, she began a relationship with Matt Rife; however they later broke up in August. She briefly dated Pete Davidson in 2019.