
Brían F. O'Byrne
Biography
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

Dead of Winter
2025
as Tall Hunter

Conclave
2024
as O'Malley

Twig
2024
as Leon

The Wonder
2022
as John Flynn

My Salinger Year
2020
as Hugh

Sergio
2020
as Gil Loescher

Queen & Country
2015
as RSM Digby

Jimmy's Hall
2014
as Commander O'Keefe

Medeas
2013
as Ennis

Gilded Lilys
2013
as Edwin Lily

Season of the Witch
2011
as Grandmaster (uncredited)

Brooklyn's Finest
2010
as Det. Ronny Rosario

The International
2009
as The Consultant

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

No Reservations
2007
as Sean

Alexander Hamilton
2007
as Alexander Hamilton

Bug
2007
as Dr. Sweet

The New World
2005
as Lewes

Million Dollar Baby
2004
as Father Horvak

The Blackwater Lightship
2004
as Larry

Easy
2003
as Mick McCabe

Intermission
2003
as Mick

Mapmaker
2001
as Richie Markey

Bandits
2001
as Darill Miller