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.

Known For

Law & Order: Special Victims Unit

Prisoner

American Experience

Oz

The Last Ship

The Magicians

FlashForward

Manhunt

All Movies (31)

• Dead of Winter2025 · as Tall Hunter
• Conclave2024 · as O'Malley
• Twig2024 · as Leon
• The Wonder2022 · as John Flynn
• My Salinger Year2020 · as Hugh
• Sergio2020 · as Gil Loescher
• Queen & Country2015 · as RSM Digby
• Jimmy's Hall2014 · as Commander O'Keefe
• Medeas2013 · as Ennis
• Gilded Lilys2013 · as Edwin Lily
• Brooklyn's Finest2010 · as Det. Ronny Rosario
• The International2009 · as The Consultant
• Before the Devil Knows You're Dead2007 · as Bobby Lasorda
• No Reservations2007 · as Sean
• Alexander Hamilton2007 · as Alexander Hamilton
• Bug2007 · as Dr. Sweet
• The New World2005 · as Lewes
• Million Dollar Baby2004 · as Father Horvak
• The Blackwater Lightship2004 · as Larry
• Easy2003 · as Mick McCabe
• Intermission2003 · as Mick
• Mapmaker2001 · as Richie Markey
• Bandits2001 · as Darill Miller
• Disco Pigs2001 · as Gerry
• The Grey Zone2001 · as Interrogator
• An Everlasting Piece2000 · as George
• The Fifth Province1997 · as Timmy
• The Last Bus Home1997 · as Jessop
• Avenue X1993 · as Sonny
• One Sweet Hour— · as Colum Byrne
• Seahorse— · as George

All TV Shows (22)

• Prisoner2026 · as Harrison Dempsey
• The Abandons2025 · as Walter Paxton
• Lincoln Rhyme: Hunt for the Bone Collector2020 · as The Bone Collector
• Hatton Garden2019 · as Basil
• Nightflyers2018 · as Auggie
• Manhunt2017 · as Frank McAlpine
• Little Boy Blue2017 · as Steve Jones
• The Magicians2015 · as Mayakovsky
• Saints & Strangers2015 · as John Billington
• The Bastard Executioner2015 · as Baron Ventris
• Aquarius2015 · as Ken Karn
• The Last Ship2014 · as Sean Ramsey
• Prime Suspect2011 · as Reg Duffy
• Mildred Pierce2011 · as Bert Pierce
• Love/Hate2010 · as Inpector Mick Moynihan
• FlashForward2009 · as Aaron Stark
• Brotherhood2006 · as Colin
• Law & Order: Special Victims Unit1999 · as Liam Connors
• Amongst Women1998 · as Luke
• Oz1997 · as Padraic Connelly
• American Experience1988 · as Alexander Hamilton
• Hallmark Hall of Fame1951 · as Larry