- Made her Broadway debut at age 4 in 1973 in A Streetcar Named Desire, which starred her mother, actress Rosemary Harris.
- Attended more than 18 schools while growing up due to the career demands of her mother.
- As a teen, she applied to attend Interlochen Arts Academy thinking that it was in upstate New York and that she'd be able to sneak out and go clubbing in New York City. In fact, the school is located in upstate Michigan.
- Lived in London for 12 years.
- Shot the pilot of Game of Thrones (playing Catelyn Stark), but decided to leave after HBO picked up the series in order to spend more time with her infant daughter.
- Has revealed on Twitter that she owns hens.
- 2000, Tony — Actress (Play): Winner
- 2007, Tony — Actress (Featured Role--Play): Winner
- 1999, Genie Awards — Best Performance by an Actress in a Leading Role: Nominee
- 2017, Tony — Actress (Play): Nominee
- 2010, Screen Actors Guild Awards — Outstanding Performance by a Cast in a Motion Picture: Winner
- 1998, BAFTA Film Awards — Best Actress in a Supporting Role: Nominee
- Michael Ryan — Husband
- Talulah Ryan — Daughter
- Colin Firth — Ex-significant Other
- John Ehle — Father
- Rosemary Harris — Mother
- George Ryan — Son
- Attended the Central School of Speech and Drama, London , England
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