Michelle Fairley (born 17 January 1964) is a Northern Irish actress, best known for her roles as Catelyn Stark in the HBO series Game of Thrones, Dr. Ava Hessington in multiple episodes of USA Network series Suits, and as terrorist Margot Al-Harazi, the main antagonist in 24: Live Another Day.
- The Others as Mrs. Marlish (2001)
- Harry Potter and the Deathly Hallows as Mrs. Granger (2010)
- Game of Thrones as Lady Catelyn Stark (2011–2013)
- Suits as Dr. Ava Hessington (2013)
- Philomena as Sally Mitchell (2013)
- 24: Live Another Day as Margot Al-Harazi (2014)
- The White Princess as Margaret Beaufort (2017)