Family
- father John Dunbar: Met Adrian's mother at a commune in the seventies, never married; chronicled their meeting after 18 years in his documentary, "Shot in the Dark" (2007)
- mother Karesse Grenier: Never married to Grenier's father; raised Adrian as a single mother
Companions
- Companion Melissa Keller: Rumored to have dated in 2007
- Melissa Joan Hart: had relationship during the filming of "Drive Me Crazy" in 1998
- Companion Ashley Greene: Reportedly dating as of June 2009
- Companion Isabel Lucas: Briefly dated in 2008; no longer together
