
Actor
Brían F. O'Byrne
Born 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.
Acting

Million Dollar Baby
Father Horvak · 2004

Law & Order: Special Victims Unit
Liam Connors · 1999

Conclave
O'Malley · 2024

The Magicians
Mayakovsky · 2015

Oz
Padraic Connelly · 1997

Before the Devil Knows You're Dead
Bobby Lasorda · 2007

No Reservations
Sean · 2007

Manhunt
Frank McAlpine · 2017

The Last Ship
Sean Ramsey · 2014

The New World
Lewes · 2005

The International
The Consultant · 2009

The Wonder
John Flynn · 2022

Bandits
Darill Miller · 2001

FlashForward
Aaron Stark · 2009

Brooklyn's Finest
Det. Ronny Rosario · 2010

Bug
Dr. Sweet · 2007

Mildred Pierce
Bert Pierce · 2011

Sergio
Gil Loescher · 2020

Lincoln Rhyme: Hunt for the Bone Collector
The Bone Collector · 2020

Dead of Winter
Tall Hunter · 2025

Jimmy's Hall
Commander O'Keefe · 2014

The Grey Zone
Interrogator · 2001

Aquarius
Ken Karn · 2015

My Salinger Year
Hugh · 2020