Brian F. O'Byrne
| Year | Movie | Function | Role |
| 2009 | The International | actor | The Consultant |
| 2009 | Brooklyn's Finest | actor | Ronny Rosario |
| 2007 | Before the Devil Knows You're Dead | actor | Bobby Lasorda (as Brķan F. O'Byrne) |
| 2007 | Before the Devil Knows You're Dead | actor | Bobby Lasorda |
| 2007 | No Reservations | actor | Sean |
| 2006 | Bug | actor | Dr. Sweet |
| 2005 | The New World | actor | Lewes |
| 2004 | Million Dollar Baby | actor | Father Horvak (as Brian O'Byrne) |
| 2004 | The Blackwater Lightship | actor | Larry |
| 2003 | Intermission | actor | Mick |
| 2001 | Disco Pigs | actor | Gerry |
| 2001 | Bandits | actor | Darill Miller |
| 2001 | The Grey Zone | actor | Gestapo Interrogator, SS-Untersturmfuhrer (as Brian O'Byrne) |