
Michael O'Neill
Known for ActingBorn 1947-05-29 (age 79)Montgomery, Alabama, USA
From Wikipedia, the free encyclopedia. Michael O'Neill (born May 29, 1951) is an American actor. With a career stretching through three decades, he usually portrays senior law enforcement or military officers. He is perhaps best known for his role as Special agent Ron Butterfield, the head of President Josiah Bartlet's Secret Service detail, on The West Wing. He played CTU Administrative Director Richard Walsh in the first two episodes of 24. He played Sgt. Maj. Ron Cheals in the CBS action-drama series The Unit. He starred in the Season Six 2 part Finale of Grey's Anatomy as the broken widower who holds the hospital hostage with a 9mm while pursuing the doctors responsible for unplugging his wife. His most notable film performances occur in Seabiscuit, Secondhand Lions, Transformers, Dancer, Texas Pop 81, Traffic, Sea of Love, A Quiet Little Marriage, Nothing But the Truth, and Green Zone. O'Neill graduated from Auburn University in 1974. After attending Auburn he spent time under the tutelage of actor Will Geer and his daughter, Ellen, at Theatricum Botanicum in Los Angeles before moving to New York to pursue his career there.Read more
Movies & web series
★ 10.0Find where to watch →
An Unremarkable Life
1989 · Movie
★ 8.4Find where to watch →
The Resident
2018 · Series
★ 8.4Find where to watch →
Sons of Anarchy
2008 · Series
★ 8.4Find where to watch →
The Mentalist
2008 · Series
★ 8.2Find where to watch →
This Is Us
2016 · Series
★ 8.3Find where to watch →
Criminal Minds
2005 · Series
★ 8.4Find where to watch →
The X-Files
1993 · Series
★ 8.1Find where to watch →
Fire Country
2022 · Series
★ 8.2Find where to watch →
Grey's Anatomy
2005 · Series
★ 8.3Find where to watch →
The West Wing
1999 · Series
★ 8.0Find where to watch →
S.W.A.T.
2017 · Series
★ 8.1Find where to watch →
Bates Motel
2013 · Series
★ 8.1Find where to watch →
Fringe
2008 · Series
★ 8.1Find where to watch →
Ghost Whisperer
2005 · Series
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Prison Break
2005 · Series
★ 7.9Find where to watch →
Dallas Buyers Club
2013 · Movie
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Rizzoli & Isles
2010 · Series
★ 7.9Find where to watch →
Boston Legal
2004 · Series
★ 7.8Find where to watch →
11.22.63
2016 · Series
★ 7.7Find where to watch →
Tom Clancy's Jack Ryan
2018 · Series
★ 7.8Find where to watch →
24
2001 · Series
★ 7.6Find where to watch →
Tracker
2024 · Series
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ER
1994 · Series
★ 7.7Find where to watch →
CSI: Miami
2002 · Series
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Roswell
1999 · Series
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Rectify
2013 · Series
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Leverage
2008 · Series
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On Yoga: The Architecture of Peace
2017 · Movie
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Millennium
1996 · Series
★ 7.6Find where to watch →
NCIS
2003 · Series
★ 7.6Find where to watch →
Commander in Chief
2005 · Series
★ 7.7Find where to watch →
The Practice
1997 · Series
★ 7.5Find where to watch →
NCIS: Los Angeles
2009 · Series
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Boston Public
2000 · Series
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One West Waikiki
1994 · Series
★ 7.6Find where to watch →
Victim of Love: The Shannon Mohr Story
1993 · Movie
★ 7.5Find where to watch →
Army Wives
2007 · Series
★ 7.3Find where to watch →
Air
2023 · Movie
★ 7.2Find where to watch →
Messiah
2020 · Series
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The Unit
2006 · Series
★ 7.3Find where to watch →
LAX
2004 · Series
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Shooter
2016 · Series
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Scandal
2012 · Series
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Without a Trace
2002 · Series
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Secondhand Lions
2003 · Movie
★ 7.3Find where to watch →
JAG
1995 · Series
★ 7.1Find where to watch →
Manhattan
2014 · Series
★ 7.2Find where to watch →
Crossing Jordan
2001 · Series