Brían F. O'Byrne
- Compleanno:
- 05/16/1967
- Luogo di nascita:
- Mullagh, County Cavan, Ireland:
 | Conclave (2024) O'Malley |
 | Twig (2024) Leon |
 | The Wonder (2022) John Flynn |
 | My Salinger Year (2020) Hugh |
 | Sergio (2020) Gil Loescher |
 | Queen & Country (2014) RSM Digby |
 | Jimmy's Hall (2014) Commander O'Keefe |
 | Medeas (2013) Ennis |
 | Gilded Lilys (2013) Edwin Lily |
 | Brooklyn's Finest (2010) Det. Ronny Rosario |
 | The International (2009) The Consultant |
 | Before the Devil Knows You're Dead (2007) Bobby Lasorda |
 | No Reservations (2007) Sean |
 | Alexander Hamilton (2007) Alexander Hamilton |
 | Bug (2007) Dr. Sweet |
 | The New World (2005) Lewes |
 | Million Dollar Baby (2004) Father Horvak |
 | The Blackwater Lightship (2004) Larry |
 | Easy (2003) Mick McCabe |
 | Intermission (2003) Mick |
 | Mapmaker (2001) Richie Markey |
 | Bandits (2001) Darill Miller |
 | Disco Pigs (2001) Gerry |
 | The Grey Zone (2001) Interrogator |
 | An Everlasting Piece (2000) George |
 | The Fifth Province (1997) Timmy |
 | The Last Bus Home (1997) Jessop |
 | The Dead of Winter |