Michael O'Neill
Born: 1947-05-29 in Montgomery, Alabama, USA
Known For: Acting
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.
Filmography
2025
- War of the Worlds as Secretary of Defense Walter Crystal
- Happy Face as D.A. Craig Calloway
- Bride Hard as Frank
2024
- Tracker as Buck Avery
- Happy's Place as Jim Jackoway
2023
- Air as Joe Dean
2022
- Fire Country as Harlan Denbo
- Outer Range as Judge Pettigrew
- Echoes as Victor McCleary
2021
- Cold Call as Christian
2020
- Messiah as Cameron Collier
- The Stand at Paxton County as Dell Connelly
2019
- Clemency as Chaplain David Kendricks
2018
- The Resident as Joshua Williams
- Tom Clancy's Jack Ryan as Senator Mitchell Chapin
- The Romanoffs as Ron Hopkins
- Indivisible as Chaplain Rogers
- Danger One as Beckwith
2017
- S.W.A.T. as Carl Luca
- On Yoga: The Architecture of Peace ... (Producer)
2016
- This Is Us as Arlo
- Shooter as Ray Brooks
- 11.22.63 as Arliss Price
2014
- Extant as Alan Sparks
- Manhattan as Psychiatrist
- The Grim Sleeper as Detective Simms
2013
- Bates Motel as Nick Ford
- Rectify as Senator Roland Foulkes
- Dallas Buyers Club as Richard Barkley
2012
- Scandal as Lonnie Mencken
2011
- J. Edgar as Senator McKellar
2010
- Rizzoli & Isles as Jonathan McKnight
- The Glades as Trent Staley
- Law & Order: LA as Jeb Monroe
- Green Zone as Colonel Bethel
- Flying Lessons as Chief Dobbs
2009
- NCIS: Los Angeles as Ret. U.S. Army General Richard Collins
- FlashForward as CIA Director Keller
2008
- The Mentalist as Sheriff Nelson
- Sons of Anarchy as Anthony Franklin
- Fringe as Sheriff Velchik
- Leverage as Judge Roy
- Nothing But the Truth as CIA Director
- Crazy as Ralph Christianson
- A Quiet Little Marriage as Bruce
2007
- Army Wives as Reverend Bankerd
- Transformers as Tom Banacheck
2005
- Grey's Anatomy as Gary Clark
- Criminal Minds as Det. Yarbough
- Prison Break as Herb Stanton
- Ghost Whisperer as Nolan
- Numb3rs as Boyd Keene
- Close to Home as Don Wheeler
- Commander in Chief as Congressman Wilcox
2004
- Boston Legal as Dr. Robert McLean
- LAX as Alonso Mathews
- Around the Bend as Cowboy
- American Crime as Sheriff Smyth
2003
- NCIS as Riley McCallister
- Seabiscuit as Mr. Pollard
- Dreamcatcher as Gen. Matheson
- Secondhand Lions as Ralph
2002
- CSI: Miami as Jerry Blackburn
- Without a Trace as Thomas Shannon
- The Emperor's Club ... (Co-Producer)
2001
- 24 as Richard Welsh
- Crossing Jordan as Chris Benz
2000
- Boston Public as Dr. Bernard Colbert
- Traffic as Lawyer Rodman
- The Legend of Bagger Vance as O.B. Keeler
1999
- The West Wing as Ron Butterfield
- Roswell as Philip Evans
- The Mod Squad as Greene
- ATF as ATF Asst. Director Ben Walker
1998
- Standoff as Cult Leader (Voice)
- Virtual Obsession
- Dancer, Texas Pop. 81 as Mr. Lusk
1997
- The Practice as Judge Robert Temple
- Ally McBeal as Dr. Colbert
- The Shining as Daniel Edwards (uncredited)
1996
- Millennium as County Prosecutor Calvin Smith
- The Sunchaser as Agent Moreland
1995
- JAG as Commander Bradley
- Bushwhacked as Jon Jordan
- Awake to Danger as Detective Brickman
1994
- ER as Col. Ken Kilner
- Chicago Hope as Bill Wyzinski
- One West Waikiki
- Blind Justice as Spencer Heymen
- Beyond Betrayal as Ray Pasquerello
1993
- The X-Files as Patrol Captain Van Gelder
- Diagnosis: Murder as Sheriff Buck O'Hara
- Victim of Love: The Shannon Mohr Story as Dick Britton
- For Their Own Good as Clark Thompson
1992
- Lorenzo's Oil as School Psychologist
- Jennifer Eight as Serato
- The Gun in Betty Lou's Handbag as Jergens
1989
- Sea of Love as Raymond Brown
- An Unremarkable Life as Michael
1981
- Ghost Story as Churchill