- Is distantly related to both Jane Austen and Lord Byron.
- Great-great grandfather was H.H. Asquith, former Prime Minister of the United Kingdom, making her a second cousin, once removed of Helena Bonham Carter.
- Left the London Academy of Music and Dramatic Arts when she became pregnant with her daughter Poppy.
- Met cameraman ex-husband Nigel Willoughby while filming for a beer commercial in 1993.
- Met husband Redha Debbah when he was working as a cab driver and took her to the West End while she was performing in The Real Inspector Hound in 1998..
- While appearing in an off-Broadway production of Creditors in 2010, became stricken with a case of viral meningitis and had to be rushed to the hospital by the play's director, Alan Rickman.
- 2014, Olivier Awards — Best Actress: Nominee
- Poppy Chancellor — Daughter
- Cecilia Chancellor — Cousin
- Nigel Willoughby — Ex-husband
- Redha Debbah — Husband
- John Chancellor — Father
- Mary Alice Jolliffe — Mother
- Kate — Sister
- Isabel — Sister
- Eddy Chancellor — Brother
- Dolly Wells — Cousin
- Jock Scott — Ex-significant Other
- Attended London Academy of Music and Dramatic Arts, London, England
Season 1, Episode 5
- Birth Place: Richmond, Surrey, England
- Birthday: April 27, 1965, Taurus
- Profession: Actor