
Acting
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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.
Also known as | مایکل اونیل |
Popular as | Acting |
Gender | MALE |
Birthday | May 29, 1947 (78 years old) |
| Year | Movie & Role |
|---|---|
| 2025 | Bride Hard as Frank |
| 2023 | Air as Joe Dean |
| 2014 | The Grim Sleeper as Detective Simms |
| 2013 | Dallas Buyers Club as Richard Barkley |
| 2010 | Green Zone as Colonel Bethel |
| 2008 | A Quiet Little Marriage as Bruce |
| 2008 | Nothing But the Truth as CIA Director |
| 2007 | Transformers as Tom Banacheck |
| 2004 | Around the Bend as Cowboy |
| 2003 | Dreamcatcher as Gen. Matheson |
| 2000 | The Legend of Bagger Vance as O.B. Keeler |
| 2000 | Traffic as Lawyer Rodman |
| 1998 | Dancer, Texas Pop. 81 as Mr. Lusk |
| 1998 | |
| 1995 | Bushwhacked as Jon Jordan |
| 1994 | Blind Justice as Spencer Heymen |
| 1993 | For Their Own Good as Clark Thompson |
| 1992 | The Gun in Betty Lou's Handbag as Jergens |
| 1989 | An Unremarkable Life as Michael |
War of the Worlds as Secretary of Defense Walter Crystal |