Brían F. O'Byrne

Acting

Born May 16, 1967, Mullagh, County Cavan, Ireland

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.

Filmography

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