Brían F. O'Byrne
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.
Born: 16 May 1967
Played In
TV Show
Apr 2026
Prisoner
Harrison Dempsey
TV Show
Dec 2025
The Abandons
Walter Paxton
Movie
Sep 2025
Dead of Winter
Tall Hunter
Movie
Oct 2024
Conclave
O'Malley
Movie
Jun 2024
Twig
Leon
Movie
Nov 2022
The Wonder
John Flynn
Movie
Feb 2020
My Salinger Year
Hugh
Movie
Jan 2020
Sergio
Gil Loescher
TV Show
Jan 2020
Lincoln Rhyme: Hunt for the Bone Collector
The Bone Collector
TV Show
May 2019
Hatton Garden
Basil
TV Show
Dec 2018
Nightflyers
Auggie
TV Show
Aug 2017
Manhunt
Frank McAlpine
TV Show
Apr 2017
Little Boy Blue
Steve Jones
TV Show
Dec 2015
The Magicians
Mayakovsky
TV Show
Nov 2015
Saints & Strangers
John Billington
TV Show
Sep 2015
The Bastard Executioner
Baron Ventris
TV Show
May 2015
Aquarius
Ken Karn
Movie
Jan 2015
Queen & Country
RSM Digby
TV Show
Jun 2014
The Last Ship
Sean Ramsey
Movie
May 2014
Jimmy's Hall
Commander O'Keefe
Movie
Sep 2013
Medeas
Ennis
Movie
May 2013
Gilded Lilys
Edwin Lily
TV Show
Sep 2011
Prime Suspect
Reg Duffy
TV Show
Mar 2011
Mildred Pierce
Bert Pierce
TV Show
Oct 2010
Love/Hate
Inpector Mick Moynihan
Movie
Mar 2010
Brooklyn's Finest
Det. Ronny Rosario
TV Show
Sep 2009
FlashForward
Aaron Stark
Movie
Feb 2009
The International
The Consultant
Movie
Sep 2007
Before the Devil Knows You're Dead
Bobby Lasorda
Movie
Jun 2007
No Reservations
Sean
Movie
May 2007
Alexander Hamilton
Alexander Hamilton
Movie
Feb 2007
Bug
Dr. Sweet
TV Show
Jul 2006
Brotherhood
Colin
Movie
Dec 2005
The New World
Lewes
Movie
Dec 2004
Million Dollar Baby
Father Horvak
Movie
Feb 2004
The Blackwater Lightship
Larry
Movie
Sep 2003
Easy
Mick McCabe
Movie
Aug 2003
Intermission
Mick
Movie
Dec 2001
Mapmaker
Richie Markey
Movie
Oct 2001
Bandits
Darill Miller
Movie
Oct 2001
Disco Pigs
Gerry
Movie
Sep 2001
The Grey Zone
Interrogator
Movie
Dec 2000
An Everlasting Piece
George
TV Show
Sep 1999
Law & Order: Special Victims Unit
Liam Connors
TV Show
Jul 1998
Amongst Women
Luke
Movie
Dec 1997
The Fifth Province
Timmy
Movie
Oct 1997
The Last Bus Home
Jessop
TV Show
Jul 1997
Oz
Padraic Connelly
Movie
Apr 1993
Avenue X
Sonny
TV Show
Oct 1988
American Experience
Alexander Hamilton
TV Show
Dec 1951
Hallmark Hall of Fame
Larry
Movie
One Sweet Hour
Colum Byrne
Movie
Seahorse
George