1947-05-29 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.
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Bride Hard | Frank | 2025-06-19 |
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War of the Worlds | Secretary of Defense Walter Crystal | 2025-07-29 |
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Air | Joe Dean | 2023-04-05 |
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Cold Call | Christian | 2021-02-04 |
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The Stand at Paxton County | Dell Connelly | 2020-05-02 |
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Clemency | Chaplain David Kendricks | 2019-12-27 |
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Indivisible | Chaplain Rogers | 2018-10-26 |
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Danger One | Beckwith | 2018-09-14 |
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The Grim Sleeper | Detective Simms | 2014-03-15 |
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Dallas Buyers Club | Richard Barkley | 2013-11-01 |
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J. Edgar | Senator McKellar | 2011-11-09 |
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Green Zone | Colonel Bethel | 2010-03-11 |
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A Quiet Little Marriage | Bruce | 2008-10-18 |
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Nothing But the Truth | CIA Director | 2008-12-19 |
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Crazy | Ralph Christianson | 2008-03-02 |
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Transformers | Tom Banacheck | 2007-06-27 |
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American Crime | Sheriff Smyth | 2004-04-06 |
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Around the Bend | Cowboy | 2004-10-08 |
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Dreamcatcher | Gen. Matheson | 2003-03-21 |
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Seabiscuit | Mr. Pollard | 2003-07-22 |
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Secondhand Lions | Ralph | 2003-09-19 |
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Traffic | Lawyer Rodman | 2000-12-27 |
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The Legend of Bagger Vance | O.B. Keeler | 2000-11-02 |
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The Mod Squad | Greene | 1999-03-26 |
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ATF | ATF Asst. Director Ben Walker | 1999-09-06 |
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Virtual Obsession | 1998-02-01 | |
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Standoff | Cult Leader (Voice) | 1998-01-11 |
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Dancer, Texas Pop. 81 | Mr. Lusk | 1998-05-01 |
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The Sunchaser | Agent Moreland | 1996-05-29 |
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Awake to Danger | Detective Brickman | 1995-03-12 |
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Bushwhacked | Jon Jordan | 1995-08-04 |
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Blind Justice | Spencer Heymen | 1994-06-25 |
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Beyond Betrayal | Ray Pasquerello | 1994-10-11 |
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Victim of Love: The Shannon Mohr Story | Dick Britton | 1993-11-09 |
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For Their Own Good | Clark Thompson | 1993-04-05 |
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Jennifer Eight | Serato | 1992-11-06 |
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Lorenzo's Oil | School Psychologist | 1992-12-30 |
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The Gun in Betty Lou's Handbag | Jergens | 1992-08-21 |
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Sea of Love | Raymond Brown | 1989-09-15 |
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An Unremarkable Life | Michael | 1989-10-12 |
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Ghost Story | Churchill | 1981-12-18 |
