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Michael O'Neill

Michael O'Neill

Birthday: 1947-05-29 | Place of Birth: Montgomery, Alabama, United States

​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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Known For

Acting

Year
Title

Role

2019
Clemency

as    Chaplain David Kendricks

2018
Indivisible

as    Chaplain Rogers

2016
11.22.63

as    Mr. Price

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

2004
American Crime

as    Sheriff Smyth

1996
The Sunchaser

as    Agent Moreland

1992
Jennifer Eight

as    Serato