Name
Michael O'Neill
Known For
Acting
Birthday
1947-05-29 (79 years old)
Place of Birth
Montgomery, Alabama, USA
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.
Known For
4.1
Will Radford is a top analyst for Homeland Security who tracks potential threats through a...
7.913
Loosely based on the true-life tale of Ron Woodroof, a drug-taking, women-loving, homophob...
5.569
Sam is a secret agent whose toughest mission to date is pleasing her bride-to-be best frie...
6.839
Young teenager Sam Witwicky becomes involved in the ancient struggle between two extraterr...
7.218
The comedic adventures of an introverted boy left on the doorstep of a pair of reluctant, ...
6.605
Seen-it-all New York detective Frank Keller is unsettled - he has done twenty years on the...
- 2007 Transformers as Tom Banacheck
- 2010 Green Zone as Colonel Bethel
- 2003 Dreamcatcher as Gen. Matheson
- 1992 The Gun in Betty Lou's Handbag as Jergens
- 2023 Air as Joe Dean
- 2004 Around the Bend as Cowboy
- 1994 Blind Justice as Spencer Heymen
- 2008 A Quiet Little Marriage as Bruce
- 1998 Dancer, Texas Pop. 81 as Mr. Lusk
- 2025 War of the Worlds as Secretary of Defense Walter Crystal
- 2013 Dallas Buyers Club as Richard Barkley
- 1993 For Their Own Good as Clark Thompson
- 1989 An Unremarkable Life as Michael
- 2025 Bride Hard as Frank
- 1995 Bushwhacked as Jon Jordan
- 2014 The Grim Sleeper as Detective Simms
- 1998 Virtual Obsession
- 2000 The Legend of Bagger Vance as O.B. Keeler
- 2000 Traffic as Lawyer Rodman
- 2008 Nothing but the Truth as CIA Director
- 1999 ATF as ATF Asst. Director Ben Walker
- 2008 Crazy as Ralph Christianson
- 1993 Victim of Love: The Shannon Mohr Story as Dick Britton
- 2003 Secondhand Lions as Ralph
- 2018 Indivisible as Chaplain Rogers
- 1996 The Sunchaser as Agent Moreland
- 1992 Jennifer Eight as Serato
- 2018 Danger One as Beckwith
- 1981 Ghost Story as Churchill
- 1989 Sea of Love as Raymond Brown
- 2019 Clemency as Chaplain David Kendricks
- 1992 Lorenzo's Oil as School Psychologist
- 1994 Beyond Betrayal as Ray Pasquerello
- 2020 The Stand at Paxton County as Dell Connelly
- 2011 J. Edgar as Senator McKellar
- 2004 American Crime as Sheriff Smyth
- 2003 Seabiscuit as Mr. Pollard
- 1999 The Mod Squad as Greene
- 2021 Cold Call as Christian
- 1995 Awake to Danger as Detective Brickman
- 1998 Standoff as Cult Leader (Voice)
- 2010 Flying Lessons as Chief Dobbs
- 2016 This Is Us ( 1 episode ) as Arlo
- 1995 JAG ( 1 episode ) as Commander Bradley
- 1993 The X-Files ( 1 episode ) as Patrol Captain Van Gelder
- 1999 Roswell ( 1 episode ) as Philip Evans
- 1994 Chicago Hope ( 1 episode ) as Bill Wyzinski
- 2005 Ghost Whisperer ( 1 episode ) as Nolan
- 2010 The Glades ( 1 episode ) as Trent Staley
- 2010 Rizzoli & Isles ( 1 episode ) as Jonathan McKnight
- 2001 24 ( 1 episode ) as Richard Walsh
- 2001 24 ( 1 episode ) as Richard Welsh
- 2014 Extant ( 13 episodes ) as Alan Sparks
- 2009 FlashForward ( 1 episode ) as CIA Director Keller
- 2010 Law & Order: LA ( 1 episode ) as Jeb Monroe
- 1993 Diagnosis: Murder ( 1 episode ) as Sheriff Buck O'Hara
- 2013 Bates Motel ( 8 episodes ) as Nick Ford
- 2014 Manhattan ( 1 episode ) as Psychiatrist
- 1999 The West Wing ( 15 episodes ) as Ron Butterfield
- 2008 Sons of Anarchy ( 1 episode ) as Anthony Franklin
- 2008 The Mentalist ( 1 episode ) as Sheriff Nelson
- 2005 Grey's Anatomy ( 4 episodes ) as Gary Clark
- 2016 11.22.63 ( 1 episode ) as Arliss Price
- 1994 One West Waikiki ( 1 episode )
- 2006 The Nine ( 3 episodes ) as Pete Burton
- 2022 Echoes ( 7 episodes ) as Victor McCleary
- 2013 Rectify ( 15 episodes ) as Senator Roland Foulkes
- 2008 Fringe ( 1 episode ) as Sheriff Velchik
- 2012 Scandal ( 5 episodes ) as Lonnie Mencken
- 2018 The Resident ( 1 episode ) as Joshua Williams
- 2005 Prison Break ( 1 episode ) as Herb Stanton
- 2009 NCIS: Los Angeles ( 1 episode ) as Ret. U.S. Army General Richard Collins
- 2003 NCIS ( 3 episodes ) as Riley McCallister
- 1994 ER ( 1 episode ) as Col. Ken Kilner
- 2005 Commander in Chief ( 2 episodes ) as Congressman Wilcox
- 2006 The Unit ( 6 episodes ) as Ron Cheals
- 2016 Shooter ( 3 episodes ) as Ray Brooks
- 2018 Tom Clancy's Jack Ryan ( 5 episodes ) as Senator Mitchell Chapin
- 2005 Criminal Minds ( 1 episode ) as Det. Yarbough
- 2022 Fire Country ( 1 episode ) as Harlan Denbo
- 2022 Outer Range ( 2 episodes ) as Judge Pettigrew
- 2008 Leverage ( 1 episode ) as Judge Roy
- 2018 The Romanoffs ( 1 episode ) as Ron Hopkins
- 2002 Without a Trace ( 1 episode ) as Thomas Shannon
- 1997 The Shining ( 1 episode ) as Daniel Edwards (uncredited)
- 2017 S.W.A.T. ( 3 episodes ) as Carl Luca
- 2001 Crossing Jordan ( 1 episode ) as Chris Benz
- 2020 Messiah ( 5 episodes ) as Cameron Collier
- 2004 LAX ( 1 episode ) as Alonso Mathews
- 2024 Happy's Place ( 2 episodes ) as Jim Jackoway
- 1996 Millennium ( 1 episode ) as County Prosecutor Calvin Smith
- 2000 Boston Public ( 4 episodes ) as Dr. Bernard Colbert
- 1997 Ally McBeal ( 1 episode ) as Dr. Colbert
- 1997 The Practice ( 1 episode ) as Judge Robert Temple
- 2005 Numb3rs ( 1 episode ) as Boyd Keene
- 2005 Close to Home ( 1 episode ) as Don Wheeler
- 2025 Happy Face ( 5 episodes ) as D.A. Craig Calloway
- 2004 Boston Legal ( 1 episode ) as Dr. Robert McLean
- 2007 Army Wives ( 2 episodes ) as Reverend Bankerd
- 2002 CSI: Miami ( 1 episode ) as Jerry Blackburn
- 2024 Tracker ( 1 episode ) as Buck Avery
- 2012 Vegas ( 4 episodes ) as Mayor Ted Bennett
