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Brían F. O'Byrne

Acting · Born May 16, 1967 · 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.

Movies with Brían F. O'Byrne

• Conclave (2024) — O'Malley
• Million Dollar Baby (2004) — Father Horvak
• The International (2009) — The Consultant
• Dead of Winter (2025) — Tall Hunter
• Season of the Witch (2011) — Grandmaster (uncredited)
• No Reservations (2007) — Sean
• The New World (2005) — Lewes
• Before the Devil Knows You're Dead (2007) — Bobby Lasorda
• The Wonder (2022) — John Flynn
• Bandits (2001) — Darill Miller
• Brooklyn's Finest (2010) — Det. Ronny Rosario
• My Salinger Year (2020) — Hugh

TV shows with Brían F. O'Byrne

• The Last Ship (2014) — Sean Ramsey
• FlashForward (2009) — Aaron Stark
• Manhunt (2017) — Frank McAlpine
• Nightflyers (2018) — Auggie
• Aquarius (2015) — Ken Karn
• Love/Hate (2010) — Inpector Mick Moynihan
• Lincoln Rhyme: Hunt for the Bone Collector (2020) — The Bone Collector
• Mildred Pierce (2011) — Bert Pierce