Acting · Mullagh, County Cavan, Ireland · Born May 16, 1967
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.
TVPrisoner
2026
as Harrison Dempsey
TVThe Abandons
2025
as Walter Paxton
MovieDead of Winter
2025
as Tall Hunter
MovieConclave
2024
as O'Malley
MovieTwig
2024
as Leon
MovieThe Wonder
2022
as John Flynn
MovieMy Salinger Year
2020
as Hugh
MovieSergio
2020
as Gil Loescher
TVLincoln Rhyme: Hunt for the Bone Collector
2020
as The Bone Collector
TVHatton Garden
2019
as Basil
TVNightflyers
2018
as Auggie
TVManhunt
2017
as Frank McAlpine
TVLittle Boy Blue
2017
as Steve Jones
TVThe Magicians
2015
as Mayakovsky
TVSaints & Strangers
2015
as John Billington
TVThe Bastard Executioner
2015
as Baron Ventris
TVAquarius
2015
as Ken Karn
MovieQueen & Country
2015
as RSM Digby
TVThe Last Ship
2014
as Sean Ramsey
MovieJimmy's Hall
2014
as Commander O'Keefe
MovieMedeas
2013
as Ennis
MovieGilded Lilys
2013
as Edwin Lily
TVPrime Suspect
2011
as Reg Duffy
TVMildred Pierce
2011
as Bert Pierce
TVLove/Hate
2010
as Inpector Mick Moynihan
MovieBrooklyn's Finest
2010
as Det. Ronny Rosario
TVFlashForward
2009
as Aaron Stark
MovieThe International
2009
as The Consultant
MovieBefore the Devil Knows You're Dead
2007
as Bobby Lasorda
MovieNo Reservations
2007
as Sean
MovieAlexander Hamilton
2007
as Alexander Hamilton
MovieBug
2007
as Dr. Sweet
TVBrotherhood
2006
as Colin
MovieThe New World
2005
as Lewes
MovieMillion Dollar Baby
2004
as Father Horvak
MovieThe Blackwater Lightship
2004
as Larry
MovieEasy
2003
as Mick McCabe
MovieIntermission
2003
as Mick
MovieMapmaker
2001
as Richie Markey
MovieBandits
2001
as Darill Miller
MovieDisco Pigs
2001
as Gerry
MovieThe Grey Zone
2001
as Interrogator
MovieAn Everlasting Piece
2000
as George
TVLaw & Order: Special Victims Unit
1999
as Liam Connors
TVAmongst Women
1998
as Luke
MovieThe Fifth Province
1997
as Timmy
MovieThe Last Bus Home
1997
as Jessop
TVOz
1997
as Padraic Connelly
MovieAvenue X
1993
as Sonny
TVAmerican Experience
1988
as Alexander Hamilton
TVHallmark Hall of Fame
1951
as Larry
MovieOne Sweet Hour
as Colum Byrne
Seahorse
as George
