Family
- brother Caleb Knightley: Born in 1979
- father Will Knightley: English; born in 1946
- mother Sharman McDonald: Scottish; born in 1951
Companions
- Companion Del Synnott: Met while working together on "Princess Of Thieves" (2001); split November 2003
- Companion Rupert Friend: Met while co-starring in "Pride & Prejudice" (2005); began dating December 2005
- Companion Jamie Dornan: Met at a Manhattan photo shoot in August 2003; split August 2005
