Michael O’Neill

Michael O'Neill Headshot

Actor

Birth Date: May 29, 1947

Age: 76 years old

Birth Place: Montgomery, Alabama

Character actor Michael O'Neill gathered a quite formidable track record of television and film credits after his first onscreen job in 1981. Yet neither his face nor his name are widely-known, with his reputation resting upon a stock in trade of upright, white-collar men playing supporting roles to the lead characters, whose dependability or otherwise often leads them into conflict. His first reasonably high-profile role remained one of his career highs, as a family man and suspected murderer opposite Al Pacino in the crime drama "Sea of Love"(1989). He was also a familiar face as Special Agent Butterfield, President Bartlet's bodyguard on "The West Wing" (NBC 1999-2006), and as murdered CTU Richard Walsh in the first season of the terrorist thriller "24" (Fox 2001-2010). Raised in Montgomery, Alabama, O'Neill was educated at the state's Auburn University and went on to pursue his acting career in New York City. Yet his onscreen career remain sparse until he was nearly forty years of age, when the "Sea of Love" role saw casting directors become familiar with his name and abilities. Over the years his talents and skill at playing men in mid-level official positions would see him act in television shows including science fiction cult favorite "The X-Files" (Fox 1993-2002), hospital drama "ER" (1994-2009) and "Grey's Anatomy" (ABC 2005- ), the latter in a standout performance as a bereaved shooter who goes on a hospital rampage. His film roles include the Nick Nolte drama "Lorenzo's Oil" (1992), horse racing period piece "Seabiscuit" (2003), blockbuster "Transformers" (2007) and the biopic "J. Edgar" (2011).

Credits

Fire CountryStream

Guest Star
Harlan Denbo
Series
2022
44%

EchoesStream

Actor
Victor McCleary
Series
2022
22%

Bound

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Jason Koss
Movie
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Council of DadsStream

Actor
Larry Mills
Series
2020
50%

The Stand at Paxton County

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Dell Connelly
Movie
2020

They Might Be Saints: Sister Marie de Mandat-Grancey

Host
Show
2019

ClemencyStream

Actor
Chaplain Kendricks
Movie
2019
92%

The RomanoffsStream

Actor
Ron Hopkins
Series
2018
49%

The ResidentStream

Guest Star
Joshua Williams
Series
2018

Indivisible

Actor
Chaplain Rogers
Movie
2018

Danger One

Actor
Beckwith
Movie
2018

The Nightmare Gallery

Original Music
Movie
2018

S.W.A.T.Stream

Guest Star
Carl
Series
2017

ShooterStream

Guest Star
Series
2016

This Is UsStream

Guest Star
Arlo
Series
2016
94%

Battle CreekStream

Guest Star
Councilman Pritchett
Series
2015
96%

Extant: Extras

Actor
Show
2014

ExtantStream

Actor
Alvin Sparks
Series
2014
77%

The Grim Sleeper

Actor
Detective Simms
Movie
2014

RectifyStream

Actor
Roland Foulkes
Series
2013
95%

RectifyStream

Guest Star
Series
2013
95%

Bates MotelStream

Guest Star
Nick Ford
Series
2013
93%

Dallas Buyers ClubStream

Actor
Richard Barkley
Movie
2013
92%

Vegas

Guest Star
Mayor Ted Bennett
Series
2012
67%

ScandalStream

Guest Star
Lonnie Mencken
Series
2012
93%

Necessary RoughnessStream

Guest Star
Series
2011

Rizzoli & IslesStream

Guest Star
Jonathan McKnight
Series
2010

Miami Medical

Guest Star
Show
2010

Green Zone

Actor
Col. Bethel
Movie
2010

FlashForwardStream

Guest Star
CIA Director Keller
Series
2009
80%

NCIS: Los AngelesStream

Guest Star
Retired U.S. Army General Richard Collins
Series
2009

LeverageStream

Guest Star
Judge Roy
Series
2008
92%

The MentalistStream

Guest Star
Sheriff Nelson
Series
2008

FringeStream

Guest Star
Elaine
Series
2008
90%

Sons of AnarchyStream

Guest Star
Anthony Franklin
Series
2008
87%

A Quiet Little Marriage

Actor
Bruce
Movie
2008

Women's Murder Club

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Show
2007

K-Ville

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Show
2007

Army WivesStream

Guest Star
Reverend Bankerd
Series
2007

TransformersStream

Actor
Banachek
Movie
2007
57%

3 Lbs.

Guest Star
Show
2006

The Nine

Guest Star
Series
2006
100%

The UnitStream

Guest Star
Series
2006
84%

Close to Home

Guest Star
Show
2005

Commander in ChiefStream

Guest Star
Congressman Wilcox
Series
2005
82%

Ghost WhispererStream

Guest Star
Series
2005

Criminal MindsStream

Guest Star
Series
2005

Prison BreakStream

Guest Star
Herb Stanton
Series
2005
61%

Grey's AnatomyStream

Guest Star
Series
2005
84%

NUMB3RSStream

Guest Star
Series
2005

Boston LegalStream

Guest Star
Dr. Robert McLean
Series
2004
86%

Around the Bend

Actor
Cowboy
Movie
2004

American Crime

Actor
Sheriff Smyth
Movie
2004

Cold CaseStream

Guest Star
Series
2003

NCISStream

Guest Star
Riley McCallister
Series
2003

Dreamcatcher

Actor
Gen. Matheson
Movie
2003

SeabiscuitStream

Actor
Mr. Pollard
Movie
2003
78%

Secondhand LionsStream

Actor
Ralph
Movie
2003
60%

Without a TraceStream

Guest Star
Series
2002

Presidio Med

Guest Star
Show
2002

CSI: MiamiStream

Guest Star
Series
2002

24Stream

Guest Star
Richard Walsh
Series
2001
87%

Boston Public

Guest Star
Series
2000

The Legend of Bagger VanceStream

Actor
O.B. Keeler
Movie
2000
43%

The West WingStream

Guest Star
Secret Service Agent Ron Butterfield
Series
1999
81%

Judging Amy

Guest Star
Series
1999

The Mod SquadStream

Actor
Det. Carl Greene
Movie
1999
3%

ATF

Actor
Asst. A.T.F. Director Ben Walker
Movie
1999

Mercy Point

Guest Star
Series
1998
30%

Virtual Obsession

Actor
Movie
1998

Dancer, Texas Pop. 81

Actor
Mr. Lusk
Movie
1998

The PracticeStream

Guest Star
Series
1997

Orleans

Guest Star
Show
1997

Millennium

Guest Star
Series
1996

Promised Land

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Series
1996

The Cape

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Show
1996

Lazarus Man

Guest Star
Show
1996

The Sunchaser

Actor
Agent Moreland
Movie
1996

JAGStream

Guest Star
Series
1995

Awake to Danger

Actor
Detective Brickman
Movie
1995

ERStream

Guest Star
Col. Ken Kilner
Series
1994

Chicago Hope

Guest Star
Series
1994

Blind Justice

Actor
Spencer Heyman
Movie
1994

Beyond Betrayal

Actor
Ray Pasquerello
Movie
1994

Diagnosis MurderStream

Guest Star
Series
1993

NYPD BlueStream

Guest Star
Capt. Chuck Dowling
Series
1993
83%

The X-FilesStream

Guest Star
Patrol Captain Van Gelder
Series
1993
74%

For Their Own Good

Actor
Clark Thompson
Movie
1993

Victim of Love: The Shannon Mohr Story

Actor
Dick Britton
Movie
1993

The Gun in Betty Lou's Handbag

Actor
Jergens
Movie
1992

Jennifer 8Stream

Actor
Serato
Movie
1992
38%

Pistola en la Cartera de Betty Lou

Actor
Movie
1992

An Unremarkable Life

Actor
Michael
Movie
1989

Sea of LoveStream

Actor
Raymond Brown
Movie
1989
75%

Gore-Met Zombie Chef From Hell

Actor
Blozor
Movie
1987

Molly

Actor
Lyle
Movie
1983