
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 …
Known For
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Filmography
Acting (52)
Movies (31)
Dead of Winter
2025as Tall Hunter
The Abandons
2025as Walter Paxton
Conclave
2024as O'Malley
Twig
2024as Leon
The Wonder
2022as John Flynn
My Salinger Year
2020as Hugh
Sergio
2020as Gil Loescher
Queen & Country
2015as RSM Digby
Jimmy's Hall
2014as Commander O'Keefe
Gilded Lilys
2013as Edwin Lily
Medeas
2013as Ennis
Brooklyn's Finest
2010as Det. Ronny Rosario
The International
2009as The Consultant
No Reservations
2007as Sean
Bug
2007as Dr. Sweet
Before the Devil Knows You're Dead
2007as Bobby Lasorda
Alexander Hamilton
2007as Alexander Hamilton
The New World
2005as Lewes
Million Dollar Baby
2004as Father Horvak
The Blackwater Lightship
2004as Larry
Easy
2003as Mick McCabe
Intermission
2003as Mick
Bandits
2001as Darill Miller
The Grey Zone
2001as Interrogator
Disco Pigs
2001as Gerry
Mapmaker
2001as Richie Markey
An Everlasting Piece
2000as George
The Last Bus Home
1997as Jessop
The Fifth Province
1997as Timmy
Avenue X
1993as Sonny
One Sweet Hour
Television (21)
The Abandons
2025as Walter Paxton
Lincoln Rhyme: Hunt for the Bone Collector
2020as The Bone Collector
Hatton Garden
2019as Basil
Nightflyers
2018as Auggie
Manhunt
2017as Frank McAlpine
Little Boy Blue
2017as Steve Jones
The Magicians
2015as Mayakovsky
Aquarius
2015as Ken Karn
Saints & Strangers
2015as John Billington
The Bastard Executioner
2015as Baron Ventris
The Last Ship
2014as Sean Ramsey
Mildred Pierce
2011as Bert Pierce
Prime Suspect
2011as Reg Duffy
Love/Hate
2010as Inpector Mick Moynihan
FlashForward
2009as Aaron Stark
Brotherhood
2006as Colin
Law & Order: Special Victims Unit
1999as Liam Connors
Amongst Women
1998as Luke
Oz
1997as Padraic Connelly
American Experience
1988as Alexander Hamilton
Hallmark Hall of Fame
1951as Larry
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