Family
- son Ralph MacFadyen: Born in September 2006; mother, Keeley Hawes
- father Martin MacFadyen:
- mother Menir MacFadyen:
- brother James MacFadyen: Younger
- daughter Maggie MacFadyen: Born in December 2004; mother, Keeley Hawes
- step-son Myles: Born in 2000; from Keeley's previous marriage to a cartoonist
Companions
- wife Keeley Hawes: Met in 2002 when they co-starred on the BBC series "Spooks"; married Oct. 8, 2004; mother of his two children; also has a son, Myles (born in 2000) from a previous marriage to a cartoonist