Family
- mother Jane Byrne:
- father Robin Byrne:
- sister Lucy Byrne: Born in 1972
- sister Alice Byrne: Born in 1973
- brother George Byrne: Born in 1976
Companions
- Companion Gregor Jordan: Australian; directed Byrne in "Two Hands" (1999); no longer together
- Companion Brendan Cowell: Australian; have kept up a long-distance relationship since c. 2003
