- Worked steadily in TV commercials from the time he was 4 until age 9, when he landed his first major acting role in the Arnold Schwarzenegger movie Last Action Hero (1993).
- Enrolled in college in 1999 after his TV series Promised Land ended its three-year run.
- Likes to write songs, play guitar and perform acoustic-alternative rock.
- Started A. O'Brien Photography in 2007 after a friend asked him to shoot his wedding.
- Produced his first film, a horror/thriller titled Nowhere Road, in 2011.
- Amanda O'Brien — Sister
- Trevor O'Brien — Brother
- Kristin Wurgler — Wife
- Azusa Pacific University, Azusa, California, United States (BA in Business Administration, 2004)