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Michael O'Neill

Michael O'Neill

Actor · Born 1947-05-29 · Montgomery, Alabama, USA

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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.

Movies & TV Shows

  1. Transformers (2007) — Tom Banacheck
  2. Grey's Anatomy (2005) — Gary Clark
  3. Dallas Buyers Club (2013) — Richard Barkley
  4. Prison Break (2005) — Herb Stanton
  5. The Mentalist (2008) — Sheriff Nelson
  6. Criminal Minds (2005) — Det. Yarbough
  7. The X-Files (1993) — Patrol Captain Van Gelder
  8. Sons of Anarchy (2008) — Anthony Franklin
  9. Fringe (2008) — Sheriff Velchik
  10. J. Edgar (2011) — Senator McKellar
  11. NCIS (2003) — Riley McCallister
  12. Traffic (2000) — Lawyer Rodman
  13. Green Zone (2010) — Colonel Bethel
  14. Air (2023) — Joe Dean
  15. Dreamcatcher (2003) — Gen. Matheson
  16. Ghost Whisperer (2005) — Nolan
  17. Tom Clancy's Jack Ryan (2018) — Senator Mitchell Chapin
  18. 24 (2001) — Richard Walsh
  19. Bates Motel (2013) — Nick Ford
  20. 11.22.63 (2016) — Arliss Price
  21. CSI: Miami (2002) — Jerry Blackburn
  22. This Is Us (2016) — Arlo
  23. S.W.A.T. (2017) — Carl Luca
  24. The Resident (2018) — Joshua Williams
  25. NCIS: Los Angeles (2009) — Ret. U.S. Army General Richard Collins
  26. War of the Worlds (2025) — Secretary of Defense Walter Crystal
  27. The Legend of Bagger Vance (2000) — O.B. Keeler
  28. Seabiscuit (2003) — Mr. Pollard
  29. ER (1994) — Col. Ken Kilner
  30. Secondhand Lions (2003) — Ralph
  31. Shooter (2016) — Ray Brooks
  32. Sea of Love (1989) — Raymond Brown
  33. Scandal (2012) — Lonnie Mencken
  34. The West Wing (1999) — Ron Butterfield
  35. Lorenzo's Oil (1992) — School Psychologist
  36. Nothing but the Truth (2008) — CIA Director
  37. FlashForward (2009) — CIA Director Keller
  38. Rizzoli & Isles (2010) — Jonathan McKnight
  39. Roswell (1999) — Philip Evans
  40. Numb3rs (2005) — Boyd Keene