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.
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Movies (44)
La guerra de los mundos
2025 · Secretary of Defense Walter Crystal
Duro de casar
2025 · Frank
Air: La historia detrás del logo
2023 · Joe Dean
Cold Call
2021 · Christian
The Stand at Paxton County
2020 · Dell Connelly
Clemencia
2019 · Chaplain David Kendricks
Indivisible
2018 · Chaplain Rogers
Danger One
2018 · Beckwith
On Yoga: The Architecture of Peace
2017 · Producer
The Grim Sleeper
2014 · Detective Simms
El Club de los Desahuciados
2013 · Richard Barkley
J. Edgar
2011 · Senator McKellar
La Ciudad de las Tormentas
2010 · Colonel Bethel
Flying Lessons
2010 · Chief Dobbs
Nada más que la verdad
2008 · CIA Director
A Quiet Little Marriage
2008 · Bruce
Crazy
2008 · Ralph Christianson
Transformers
2007 · Tom Banacheck
Around the Bend
2004 · Cowboy
American Crime
2004 · Sheriff Smyth
Leones de Segunda Mano
2003 · Ralph
Alma de héroes
2003 · Mr. Pollard
El cazador de sueños
2003 · Gen. Matheson
Lección de honor
2002 · Co-Producer
Tráfico
2000 · Lawyer Rodman
Leyendas de vida
2000 · O.B. Keeler
ATF
1999 · ATF Asst. Director Ben Walker
The Mod Squad
1999 · Greene
Dancer, Texas Pop. 81
1998 · Mr. Lusk
Virtual Obsession
1998
Standoff
1998 · Cult Leader (Voice)
The Sunchaser
1996 · Agent Moreland
Bushwhacked
1995 · Jon Jordan
Awake to Danger
1995 · Detective Brickman
Beyond Betrayal
1994 · Ray Pasquerello
Blind Justice
1994 · Spencer Heymen
Victim of Love: The Shannon Mohr Story
1993 · Dick Britton
For Their Own Good
1993 · Clark Thompson
Lorenzo's Oil
1992 · School Psychologist
Jennifer Eight
1992 · Serato
The Gun in Betty Lou's Handbag
1992 · Jergens
An Unremarkable Life
1989 · Michael
Sea of Love
1989 · Raymond Brown
Ghost Story
1981 · Churchill
TV shows (59)
Happy Face: Asesino en Serie
2025 · D.A. Craig Calloway
Happy's Place
2024 · Jim Jackoway
Tracker
2024 · Buck Avery
Fire Country
2022 · Harlan Denbo
Ecos
2022 · Victor McCleary
Tierra de nadie
2022 · Judge Pettigrew
Mesías
2020 · Cameron Collier
The Romanoffs
2018 · Ron Hopkins
Jack Ryan
2018 · Senator Mitchell Chapin
The Resident
2018 · Joshua Williams
S.W.A.T.
2017 · Carl Luca
El tirador
2016 · Ray Brooks
This Is Us
2016 · Arlo
22.11.63
2016 · Arliss Price
Manhattan
2014 · Psychiatrist
Extan I
2014 · Alan Sparks
Rectify
2013 · Senator Roland Foulkes
Bates Motel
2013 · Nick Ford
Vegas
2012 · Mayor Ted Bennett
Escándalo
2012 · Lonnie Mencken
La ley y el orden: Los Angeles
2010 · Jeb Monroe
Rizzoli & Isles
2010 · Jonathan McKnight
The Glades
2010 · Trent Staley
FlashForward
2009 · CIA Director Keller
NCIS: Los Ángeles
2009 · Ret. U.S. Army General Richard Collins
Las reglas del juego
2008 · Judge Roy
El mentalista
2008 · Sheriff Nelson
Fringe
2008 · Sheriff Velchik
Hijos de la anarquía
2008 · Anthony Franklin
Army Wives
2007 · Reverend Bankerd
The Nine
2006 · Pete Burton
The Unit
2006 · Ron Cheals
Commander in Chief
2005 · Congressman Wilcox
Almas perdidas
2005 · Nolan
Mentes Criminales
2005 · Det. Yarbough
Close to Home
2005 · Don Wheeler
Prison Break
2005 · Herb Stanton
Grey's Anatomy
2005 · Gary Clark
Numb3rs
2005 · Boyd Keene
Justicia Ciega
2004 · Dr. Robert McLean
LAX
2004 · Alonso Mathews
NCIS
2003 · Riley McCallister
Sin rastro
2002 · Thomas Shannon
CSI: Miami
2002 · Jerry Blackburn
24
2001 · Richard Walsh, Richard Welsh
Crossing Jordan
2001 · Chris Benz
Boston Public
2000 · Dr. Bernard Colbert
Roswell
1999 · Philip Evans
The West Wing
1999 · Ron Butterfield
Ally McBeal
1997 · Dr. Colbert
The Shining
1997 · Daniel Edwards (uncredited)
The Practice
1997 · Judge Robert Temple
Millennium
1996 · County Prosecutor Calvin Smith
JAG
1995 · Commander Bradley
ER
1994 · Col. Ken Kilner
Chicago Hope
1994 · Bill Wyzinski
One West Waikiki
1994
Diagnosis: Murder
1993 · Sheriff Buck O'Hara
The X-Files
1993 · Patrol Captain Van Gelder