Born 1967 (age 58) · Mullagh, County Cavan, Ireland
Appears in 53 titles

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.

Filmography

Million Dollar Baby
8.0
Million Dollar Baby
2004
as Father Horvak
Conclave
7.2
Conclave
2024
as O'Malley
Before the Devil Knows You're Dead
7.1
Before the Devil Knows You're Dead
2007
as Bobby Lasorda
No Reservations
6.7
No Reservations
2007
as Sean
The International
6.3
The International
2009
as The Consultant
The New World
6.5
The New World
2005
as Lewes
Bandits
6.3
Bandits
2001
as Darill Miller
Brooklyn's Finest
6.3
Brooklyn's Finest
2010
as Det. Ronny Rosario
The Wonder
6.6
The Wonder
2022
as John Flynn
Bug
6.1
Bug
2007
as Dr. Sweet
Sergio
6.6
Sergio
2020
as Gil Loescher
Dead of Winter
6.3
Dead of Winter
2025
as Tall Hunter
Jimmy's Hall
6.7
Jimmy's Hall
2014
as Commander O'Keefe
My Salinger Year
6.3
My Salinger Year
2020
as Hugh
The Grey Zone
6.6
The Grey Zone
2001
as Interrogator
Intermission
6.2
Intermission
2003
as Mick
Disco Pigs
5.7
Disco Pigs
2001
as Gerry
Queen & Country
6.1
Queen & Country
2015
as RSM Digby
Easy
5.8
Easy
2003
as Mick McCabe
Medeas
5.7
Medeas
2013
as Ennis