Brían F. O'Byrne
Acting
53
Acting Credits
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
Filmography
Prisoner
2026
as Harrison Dempsey
Dead of Winter
2025
as Tall Hunter
Task
2025
as Charlie Boylan
The Abandons
2025
as Walter Paxton
Twig
2024
as Leon
Conclave
2024
as O'Malley
The Wonder
2022
as John Flynn
Sergio
2020
as Gil Loescher
My Salinger Year
2020
as Hugh
Lincoln Rhyme: Hunt for the Bone Collector
2020
as The Bone Collector
Hatton Garden
2019
as Basil
Nightflyers
2018
as Auggie
Little Boy Blue
2017
as Steve Jones
Manhunt
2017
as Frank McAlpine
Queen & Country
2015
as RSM Digby
Aquarius
2015
as Ken Karn
Saints & Strangers
2015
as John Billington
The Bastard Executioner
2015
as Baron Ventris
The Magicians
2015
as Mayakovsky
Jimmy's Hall
2014
as Commander O'Keefe
The Last Ship
2014
as Sean Ramsey
Medeas
2013
as Ennis
Gilded Lilys
2013
as Edwin Lily
Season of the Witch
2011
as Grandmaster (uncredited)
Mildred Pierce
2011
as Bert Pierce
Prime Suspect
2011
as Reg Duffy
Brooklyn's Finest
2010
as Det. Ronny Rosario
Love/Hate
2010
as Inpector Mick Moynihan
The International
2009
as The Consultant
FlashForward
2009
as Aaron Stark
No Reservations
2007
as Sean
Before the Devil Knows You're Dead
2007
as Bobby Lasorda
Bug
2007
as Dr. Sweet
Alexander Hamilton
2007
as Alexander Hamilton
Brotherhood
2006
as Colin
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
Bandits
2001
as Darill Miller
Disco Pigs
2001
as Gerry
The Grey Zone
2001
as Interrogator
Mapmaker
2001
as Richie Markey
An Everlasting Piece
2000
as George
Law & Order: Special Victims Unit
1999
as Liam Connors
Amongst Women
1998
as Luke
The Last Bus Home
1997
as Jessop
The Fifth Province
1997
as Timmy
Oz
1997
as Padraic Connelly
Avenue X
1993
as Sonny
American Experience
1988
as Alexander Hamilton
Hallmark Hall of Fame
1951
as Larry