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Michael O'Neill

1947-05-29

The Biography

​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.

Michael O'Neill in

Movies

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Transformers

6.808 average rating
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Air

7.346 average rating
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Traffic

7.1 average rating
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Dallas Buyers Club

7.928 average rating
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Dreamcatcher

5.623 average rating
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Green Zone

6.468 average rating
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Lorenzo's Oil

7.1 average rating
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Bushwhacked

5.2 average rating
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The Legend of Bagger Vance

6.572 average rating
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J. Edgar

6.228 average rating
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The Mod Squad

4.3 average rating
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Sea of Love

6.59 average rating
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Secondhand Lions

7.166 average rating
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Jennifer Eight

6 average rating
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Seabiscuit

7.1 average rating
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Ghost Story

6 average rating
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Nothing But the Truth

6.939 average rating
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Around the Bend

5.9 average rating
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Indivisible

6.9 average rating
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Clemency

6.3 average rating