
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.
Gallery



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









