
Brían F. O'Byrne
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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
Credits

Dead of Winter (2025)
as Tall Hunter

Million Dollar Baby (2004)
as Father Horvak

Conclave (2024)
as O'Malley

No Reservations (2007)
as Sean

The New World (2005)
as Lewes

Before the Devil Knows You're Dead (2007)
as Bobby Lasorda

The Wonder (2022)
as John Flynn

Bandits (2001)
as Darill Miller

The International (2009)
as The Consultant

Brooklyn's Finest (2010)
as Det. Ronny Rosario

Easy (2003)
as Mick McCabe

The Grey Zone (2001)
as Interrogator

Bug (2007)
as Dr. Sweet

Sergio (2020)
as Gil Loescher

Intermission (2003)
as Mick

My Salinger Year (2020)
as Hugh

Queen & Country (2015)
as RSM Digby

Disco Pigs (2001)
as Gerry

Jimmy's Hall (2014)
as Commander O'Keefe

Gilded Lilys (2013)
as Edwin Lily

Medeas (2013)
as Ennis

An Everlasting Piece (2000)
as George

Twig (2024)
as Leon

The Blackwater Lightship (2004)
as Larry

Alexander Hamilton (2007)
as Alexander Hamilton

The Last Bus Home (1997)
as Jessop

One Sweet Hour (—)
as Colum Byrne

Mapmaker (2001)
as Richie Markey

The Fifth Province (1997)
as Timmy
Seahorse (—)
as George

Avenue X (1993)
as Sonny





