Michael O'Neill
- Known for
- Acting
- Born
- May 29, 1947 (age 79)
- Place of birth
- Montgomery, Alabama, USA
- Credits
- 101
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
Filmography
War of the Worlds
2025Movie
Secretary of Defense Walter Crystal
Bride Hard
2025Movie
Frank
Happy Face
2025TV
D.A. Craig Calloway
Happy's Place
2024TV
Jim Jackoway
Tracker
2024TV
Buck Avery
Air
2023Movie
Joe Dean
Fire Country
2022TV
Harlan Denbo
Echoes
2022TV
Victor McCleary
Outer Range
2022TV
Judge Pettigrew
Cold Call
2021Movie
Christian
The Stand at Paxton County
2020Movie
Dell Connelly
Messiah
2020TV
Cameron Collier
Clemency
2019Movie
Chaplain David Kendricks
Indivisible
2018Movie
Chaplain Rogers
The Romanoffs
2018TV
Ron Hopkins
Danger One
2018Movie
Beckwith
Tom Clancy's Jack Ryan
2018TV
Senator Mitchell Chapin
The Resident
2018TV
Joshua Williams
S.W.A.T.
2017TV
Carl Luca
Shooter
2016TV
Ray Brooks
This Is Us
2016TV
Arlo
11.22.63
2016TV
Arliss Price
Manhattan
2014TV
Psychiatrist
Extant
2014TV
Alan Sparks
The Grim Sleeper
2014Movie
Detective Simms
Dallas Buyers Club
2013Movie
Richard Barkley
Rectify
2013TV
Senator Roland Foulkes
Bates Motel
2013TV
Nick Ford
Vegas
2012TV
Mayor Ted Bennett
Scandal
2012TV
Lonnie Mencken
J. Edgar
2011Movie
Senator McKellar
Law & Order: LA
2010TV
Jeb Monroe
Rizzoli & Isles
2010TV
Jonathan McKnight
The Glades
2010TV
Trent Staley
Green Zone
2010Movie
Colonel Bethel
Flying Lessons
2010Movie
Chief Dobbs
FlashForward
2009TV
CIA Director Keller
NCIS: Los Angeles
2009TV
Ret. U.S. Army General Richard Collins
Nothing But the Truth
2008Movie
CIA Director
Leverage
2008TV
Judge Roy
A Quiet Little Marriage
2008Movie
Bruce
The Mentalist
2008TV
Sheriff Nelson
Fringe
2008TV
Sheriff Velchik
Sons of Anarchy
2008TV
Anthony Franklin
Crazy
2008Movie
Ralph Christianson
Transformers
2007Movie
Tom Banacheck
Army Wives
2007TV
Reverend Bankerd
The Nine
2006TV
Pete Burton
The Unit
2006TV
Ron Cheals
Commander in Chief
2005TV
Congressman Wilcox
Ghost Whisperer
2005TV
Nolan
Criminal Minds
2005TV
Det. Yarbough
Close to Home
2005TV
Don Wheeler
Prison Break
2005TV
Herb Stanton
Grey's Anatomy
2005TV
Gary Clark
Numb3rs
2005TV
Boyd Keene
Around the Bend
2004Movie
Cowboy
Boston Legal
2004TV
Dr. Robert McLean
LAX
2004TV
Alonso Mathews
American Crime
2004Movie
Sheriff Smyth
NCIS
2003TV
Riley McCallister
Secondhand Lions
2003Movie
Ralph
Seabiscuit
2003Movie
Mr. Pollard
Dreamcatcher
2003Movie
Gen. Matheson
Without a Trace
2002TV
Thomas Shannon
CSI: Miami
2002TV
Jerry Blackburn
24
2001TV
Richard Walsh, Richard Welsh
Crossing Jordan
2001TV
Chris Benz
Traffic
2000Movie
Lawyer Rodman
The Legend of Bagger Vance
2000Movie
O.B. Keeler
Boston Public
2000TV
Dr. Bernard Colbert
Roswell
1999TV
Philip Evans
The West Wing
1999TV
Ron Butterfield
ATF
1999Movie
ATF Asst. Director Ben Walker
The Mod Squad
1999Movie
Greene
Dancer, Texas Pop. 81
1998Movie
Mr. Lusk
Virtual Obsession
1998Movie
Standoff
1998Movie
Cult Leader (Voice)
Ally McBeal
1997TV
Dr. Colbert
The Shining
1997TV
Daniel Edwards (uncredited)
The Practice
1997TV
Judge Robert Temple
Millennium
1996TV
County Prosecutor Calvin Smith
The Sunchaser
1996Movie
Agent Moreland
JAG
1995TV
Commander Bradley
Bushwhacked
1995Movie
Jon Jordan
Awake to Danger
1995Movie
Detective Brickman
Beyond Betrayal
1994Movie
Ray Pasquerello
ER
1994TV
Col. Ken Kilner
Chicago Hope
1994TV
Bill Wyzinski
One West Waikiki
1994TV
Blind Justice
1994Movie
Spencer Heymen
Victim of Love: The Shannon Mohr Story
1993Movie
Dick Britton
Diagnosis: Murder
1993TV
Sheriff Buck O'Hara
The X-Files
1993TV
Patrol Captain Van Gelder
For Their Own Good
1993Movie
Clark Thompson
Lorenzo's Oil
1992Movie
School Psychologist
Jennifer Eight
1992Movie
Serato
The Gun in Betty Lou's Handbag
1992Movie
Jergens
An Unremarkable Life
1989Movie
Michael
Sea of Love
1989Movie
Raymond Brown
Ghost Story
1981Movie
Churchill