
Brían F. O'Byrne
Acting
Born 1967-05-16 · Mullagh, County Cavan, Ireland
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

Conclave
2024 · Movie

Million Dollar Baby
2004 · Movie

Dead of Winter
2025 · Movie

No Reservations
2007 · Movie

Bandits
2001 · Movie

The New World
2005 · Movie

Before the Devil Knows You're Dead
2007 · Movie

The Wonder
2022 · Movie

The International
2009 · Movie

Brooklyn's Finest
2010 · Movie

Sergio
2020 · Movie

Gilded Lilys
2013 · Movie

Bug
2007 · Movie

The Grey Zone
2001 · Movie

Mapmaker
2001 · Movie

My Salinger Year
2020 · Movie

Intermission
2003 · Movie

Queen & Country
2015 · Movie

Easy
2003 · Movie

Jimmy's Hall
2014 · Movie

Disco Pigs
2001 · Movie

Avenue X
1993 · Movie

The Blackwater Lightship
2004 · Movie

An Everlasting Piece
2000 · Movie

Medeas
2013 · Movie

The Fifth Province
1997 · Movie

Alexander Hamilton
2007 · Movie

The Last Bus Home
1997 · Movie

Twig
2024 · Movie

One Sweet Hour
— · Movie