Image of Michael O'Neill

Michael O'Neill

1947-05-29 Montgomery, Alabama, USA

Image of Michael O'Neill


​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.


Air Joe Dean 2023-04-05
Cold Call Christian 2021-02-04
The Stand at Paxton County Dell Connelly 2020-05-02
Clemency Chaplain David Kendricks 2019-12-27
Danger One Beckwith 2018-09-14
Indivisible Chaplain Rogers 2018-10-26
The Grim Sleeper Detective Simms 2014-03-15
Dallas Buyers Club Richard Barkley 2013-11-01
J. Edgar Senator McKellar 2011-11-09
Green Zone Colonel Bethel 2010-03-11
A Quiet Little Marriage Bruce 2008-10-18
Crazy Ralph Christianson 2008-03-02
Transformers Tom Banacheck 2007-06-27
Around the Bend Cowboy 2004-10-08
American Crime Sheriff Smyth 2004-04-06
Secondhand Lions Ralph 2003-09-19
Dreamcatcher General Matheson 2003-03-21
Seabiscuit Mr. Pollard 2003-07-22
The Legend of Bagger Vance O.B. Keeler 2000-11-02
Traffic Lawyer Rodman 2000-12-27
The Mod Squad Greene 1999-03-26
ATF Asst. A.T.F. Director Ben Walker 1999-09-06
Virtual Obsession 1998-02-01
Dancer, Texas Pop. 81 Mr. Lusk 1998-05-01
The Sunchaser Agent Moreland 1996-05-29
Awake to Danger Detective Brickman 1995-03-12
Bushwhacked Jon Jordan 1995-08-04
Blind Justice Spencer Heymen 1994-06-25
Beyond Betrayal Ray Pasquerello 1994-10-11
Victim of Love: The Shannon Mohr Story Dick Britton 1993-11-09
For Their Own Good Clark Thompson 1993-04-05
Lorenzo's Oil School Psychologist 1992-12-30
The Gun in Betty Lou's Handbag Jergens 1992-08-21
Jennifer Eight Serato 1992-11-06
An Unremarkable Life Michael 1989-10-12
Sea of Love Raymond Brown 1989-09-15
Ghost Story Churchill 1981-12-18
War of the Worlds
Bride Hard