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