
Brían F. O'Byrne
Acting
Brían Francis O'Byrne (born 16 May 1967) is an Irish actor who works mostly in the United States. He was born in Mullagh, County Cavan. O'Byrne first attracted notice for his performances in the Martin McDonagh plays The Beauty Queen of Leenane (1996) as Pato Dooley (for which he received a Tony Award nomination for Best Featured Actor in a Play) and The Lonesome West (1997). He is known for taking on serious and dramatic roles, such as a serial killer in Frozen (1998) (for which he won a Tony Award) and a priest accused of child molestation in Doubt (2004), for which he received a Tony nomination. O'Byrne also appeared as a priest in the 2004 film Million Dollar Baby. In May 2007, O'Byrne was nominated for a Tony Award for his performance as Alexander Herzen in Tom Stoppard's 2002 trilogy The Coast of Utopia. In 2011, he was nominated for the Primetime Emmy Award for Outstanding Supporting Actor in a Miniseries or a Movie for his performance in Mildred Pierce as Bert Pierce.
Known For

1999
Law & Order: Special Victims Unit
1999 · tv

1988
American Experience
1988 · tv

1997
Oz
1997 · tv

2014
The Last Ship
2014 · tv

2015
The Magicians
2015 · tv

2026
Prisoner
2026 · tv

2009
FlashForward
2009 · tv

2017
Manhunt
2017 · tv

2024
Conclave
2024 · movie

2004
Million Dollar Baby
2004 · movie

2006
Brotherhood
2006 · tv

2025
The Abandons
2025 · tv

2015
Aquarius
2015 · tv

2010
Love/Hate
2010 · tv

2007
No Reservations
2007 · movie

2011
Mildred Pierce
2011 · tv

2025
Dead of Winter
2025 · movie

2020
Lincoln Rhyme: Hunt for the Bone Collector
2020 · tv

2018
Nightflyers
2018 · tv

2011
Prime Suspect
2011 · tv

2015
The Bastard Executioner
2015 · tv

2001
Bandits
2001 · movie

1951
Hallmark Hall of Fame
1951 · tv

2007
Bug
2007 · movie

2005
The New World
2005 · movie

2009
The International
2009 · movie

2022
The Wonder
2022 · movie

2007
Before the Devil Knows You're Dead
2007 · movie

2017
Little Boy Blue
2017 · tv

2019
Hatton Garden
2019 · tv