Michael O'Neill

Michael O'Neill

Age: 78 years old
Born: May 29, 1947 in Montgomery, Alabama, USA
​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 Pres...ident 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.
War of the Worlds

War of the Worlds

Movie | 2025
Secretary of Defense Walter Crystal
Bride Hard

Bride Hard

Movie | 2025
Frank
Happy Face

Happy Face

TV | 2025
D.A. Craig Calloway
5 Episodes
Outer Range

Outer Range

TV | 2024
Judge Pettigrew
2 Episodes
Happy's Place

Happy's Place

TV | 2024
Jim Jackoway
2 Episodes
Air

Air

Movie | 2023
Joe Dean
Fire Country

Fire Country

TV | 2023
Harlan Denbo
One Episode
Echoes

Echoes

TV | 2022
Victor McCleary
7 Episodes
Cold Call

Cold Call

Movie | 2021
Christian
This Is Us

This Is Us

TV | 2021
Arlo
One Episode
NCIS: Los Angeles

NCIS: Los Angeles

TV | 2021
Ret. U.S. Army General Richard Collins
One Episode
The Stand at Paxton County

The Stand at Paxton County

Movie | 2020
Dell Connelly
Messiah

Messiah

TV | 2020
Cameron Collier
5 Episodes
Clemency

Clemency

Movie | 2019
Chaplain David Kendricks
Tom Clancy's Jack Ryan

Tom Clancy's Jack Ryan

TV | 2019
Senator Mitchell Chapin
5 Episodes
Indivisible

Indivisible

Movie | 2018
Chaplain Rogers
Danger One

Danger One

Movie | 2018
Beckwith
Scandal

Scandal

TV | 2018
Lonnie Mencken
5 Episodes
The Resident

The Resident

TV | 2018
Joshua Williams
One Episode
Shooter

Shooter

TV | 2018
Ray Brooks
3 Episodes
The Romanoffs

The Romanoffs

TV | 2018
Ron Hopkins
One Episode
S.W.A.T.

S.W.A.T.

TV | 2017
Carl Luca
3 Episodes
11.22.63

11.22.63

TV | 2016
Arliss Price
One Episode
Manhattan

Manhattan

TV | 2015
Psychiatrist
One Episode
The Grim Sleeper

The Grim Sleeper

Movie | 2014
Detective Simms
Extant

Extant

TV | 2014
Alan Sparks
13 Episodes
Bates Motel

Bates Motel

TV | 2014
Nick Ford
8 Episodes
Dallas Buyers Club

Dallas Buyers Club

Movie | 2013
Richard Barkley
Rizzoli & Isles

Rizzoli & Isles

TV | 2013
Jonathan McKnight
One Episode
Rectify

Rectify

TV | 2013
Senator Roland Foulkes
15 Episodes
J. Edgar

J. Edgar

Movie | 2011
Senator McKellar
The Glades

The Glades

TV | 2011
Trent Staley
One Episode
Green Zone

Green Zone

Movie | 2010
Colonel Bethel
Law & Order: LA

Law & Order: LA

TV | 2010
Jeb Monroe
One Episode
Grey's Anatomy

Grey's Anatomy

TV | 2010
Gary Clark
4 Episodes
Fringe

Fringe

TV | 2010
Sheriff Velchik
One Episode
NCIS

NCIS

TV | 2010
Riley McCallister
3 Episodes
Numb3rs

Numb3rs

TV | 2010
Boyd Keene
One Episode
Ghost Whisperer

Ghost Whisperer

TV | 2009
Nolan
One Episode
FlashForward

FlashForward

TV | 2009
CIA Director Keller
One Episode
Sons of Anarchy

Sons of Anarchy

TV | 2009
Anthony Franklin
One Episode
A Quiet Little Marriage

A Quiet Little Marriage

Movie | 2008
Bruce
Nothing But the Truth

Nothing But the Truth

Movie | 2008
CIA Director
Crazy

Crazy

Movie | 2008
Ralph Christianson
The Mentalist

The Mentalist

TV | 2008
Sheriff Nelson
One Episode
Prison Break

Prison Break

TV | 2008
Herb Stanton
One Episode
Leverage

Leverage

TV | 2008
Judge Roy
One Episode
Transformers

Transformers

Movie | 2007
Tom Banacheck
Criminal Minds

Criminal Minds

TV | 2007
Det. Yarbough
One Episode
The Nine

The Nine

TV | 2006
Pete Burton
3 Episodes
The Unit

The Unit

TV | 2006
Ron Cheals
One Episode
Close to Home

Close to Home

TV | 2006
Don Wheeler
One Episode
ER

ER

TV | 2005
Col. Ken Kilner
One Episode
Commander in Chief

Commander in Chief

TV | 2005
Congressman Wilcox
2 Episodes
Boston Legal

Boston Legal

TV | 2005
Dr. Robert McLean
One Episode
Around the Bend

Around the Bend

Movie | 2004
Cowboy
American Crime

American Crime

Movie | 2004
Sheriff Smyth
Crossing Jordan

Crossing Jordan

TV | 2004
Chris Benz
One Episode
LAX

LAX

TV | 2004
Alonso Mathews
One Episode
The Practice

The Practice

TV | 2004
Judge Robert Temple
One Episode
Dreamcatcher

Dreamcatcher

Movie | 2003
Gen. Matheson
Secondhand Lions

Secondhand Lions

Movie | 2003
Ralph
Seabiscuit

Seabiscuit

Movie | 2003
Mr. Pollard
Without a Trace

Without a Trace

TV | 2002
Thomas Shannon
One Episode
Ally McBeal

Ally McBeal

TV | 2002
Dr. Colbert
One Episode
24

24

TV | 2001
Richard Walsh
One Episode
24

24

TV | 2001
Richard Welsh
One Episode
Diagnosis: Murder

Diagnosis: Murder

TV | 2001
Sheriff Buck O'Hara
One Episode
Boston Public

Boston Public

TV | 2001
Dr. Bernard Colbert
4 Episodes
The Legend of Bagger Vance

The Legend of Bagger Vance

Movie | 2000
O.B. Keeler
Traffic

Traffic

Movie | 2000
Lawyer Rodman
Chicago Hope

Chicago Hope

TV | 2000
One Episode
ATF

ATF

Movie | 1999
ATF Asst. Director Ben Walker
The Mod Squad

The Mod Squad

Movie | 1999
Greene
JAG

JAG

TV | 1999
Commander Bradley
One Episode
Roswell

Roswell

TV | 1999
Philip Evans
One Episode
The West Wing

The West Wing

TV | 1999
Ron Butterfield
15 Episodes
Dancer, Texas Pop. 81

Dancer, Texas Pop. 81

Movie | 1998
Mr. Lusk
Virtual Obsession

Virtual Obsession

Movie | 1998
Standoff

Standoff

Movie | 1998
Cult Leader (Voice)
The X-Files

The X-Files

TV | 1998
Patrol Captain Van Gelder
One Episode
The Shining

The Shining

TV | 1997
Daniel Edwards (uncredited)
One Episode
Millennium

Millennium

TV | 1997
County Prosecutor Calvin Smith
One Episode
The Sunchaser

The Sunchaser

Movie | 1996
Agent Moreland
Bushwhacked

Bushwhacked

Movie | 1995
Jon Jordan
Awake to Danger

Awake to Danger

Movie | 1995
Detective Brickman
One West Waikiki

One West Waikiki

TV | 1995
One Episode
Blind Justice

Blind Justice

Movie | 1994
Spencer Heymen
Beyond Betrayal

Beyond Betrayal

Movie | 1994
Ray Pasquerello
For Their Own Good

For Their Own Good

Movie | 1993
Clark Thompson
Victim of Love: The Shannon Mohr Story

Victim of Love: The Shannon Mohr Story

Movie | 1993
Dick Britton
The Gun in Betty Lou's Handbag

The Gun in Betty Lou's Handbag

Movie | 1992
Jergens
Jennifer Eight

Jennifer Eight

Movie | 1992
Serato
Lorenzo's Oil

Lorenzo's Oil

Movie | 1992
School Psychologist
An Unremarkable Life

An Unremarkable Life

Movie | 1989
Michael
Sea of Love

Sea of Love

Movie | 1989
Raymond Brown
Ghost Story

Ghost Story

Movie | 1981
Churchill
War of the Worlds

War of the Worlds

Movie | 2025
Secretary of Defense Walter Crystal
Bride Hard

Bride Hard

Movie | 2025
Frank
Air

Air

Movie | 2023
Joe Dean
Cold Call

Cold Call

Movie | 2021
Christian
The Stand at Paxton County

The Stand at Paxton County

Movie | 2020
Dell Connelly
Clemency

Clemency

Movie | 2019
Chaplain David Kendricks
Indivisible

Indivisible

Movie | 2018
Chaplain Rogers
Danger One

Danger One

Movie | 2018
Beckwith
The Grim Sleeper

The Grim Sleeper

Movie | 2014
Detective Simms
Dallas Buyers Club

Dallas Buyers Club

Movie | 2013
Richard Barkley
J. Edgar

J. Edgar

Movie | 2011
Senator McKellar
Green Zone

Green Zone

Movie | 2010
Colonel Bethel
A Quiet Little Marriage

A Quiet Little Marriage

Movie | 2008
Bruce
Nothing But the Truth

Nothing But the Truth

Movie | 2008
CIA Director
Crazy

Crazy

Movie | 2008
Ralph Christianson
Transformers

Transformers

Movie | 2007
Tom Banacheck
Around the Bend

Around the Bend

Movie | 2004
Cowboy
American Crime

American Crime

Movie | 2004
Sheriff Smyth
Dreamcatcher

Dreamcatcher

Movie | 2003
Gen. Matheson
Secondhand Lions

Secondhand Lions

Movie | 2003
Ralph
Seabiscuit

Seabiscuit

Movie | 2003
Mr. Pollard
The Legend of Bagger Vance

The Legend of Bagger Vance

Movie | 2000
O.B. Keeler
Traffic

Traffic

Movie | 2000
Lawyer Rodman
ATF

ATF

Movie | 1999
ATF Asst. Director Ben Walker
The Mod Squad

The Mod Squad

Movie | 1999
Greene
Dancer, Texas Pop. 81

Dancer, Texas Pop. 81

Movie | 1998
Mr. Lusk
Virtual Obsession

Virtual Obsession

Movie | 1998
Standoff

Standoff

Movie | 1998
Cult Leader (Voice)
The Sunchaser

The Sunchaser

Movie | 1996
Agent Moreland
Bushwhacked

Bushwhacked

Movie | 1995
Jon Jordan
Awake to Danger

Awake to Danger

Movie | 1995
Detective Brickman
Blind Justice

Blind Justice

Movie | 1994
Spencer Heymen
Beyond Betrayal

Beyond Betrayal

Movie | 1994
Ray Pasquerello
For Their Own Good

For Their Own Good

Movie | 1993
Clark Thompson
Victim of Love: The Shannon Mohr Story

Victim of Love: The Shannon Mohr Story

Movie | 1993
Dick Britton
The Gun in Betty Lou's Handbag

The Gun in Betty Lou's Handbag

Movie | 1992
Jergens
Jennifer Eight

Jennifer Eight

Movie | 1992
Serato
Lorenzo's Oil

Lorenzo's Oil

Movie | 1992
School Psychologist
An Unremarkable Life

An Unremarkable Life

Movie | 1989
Michael
Sea of Love

Sea of Love

Movie | 1989
Raymond Brown
Ghost Story

Ghost Story

Movie | 1981
Churchill
Happy Face

Happy Face

TV | 2025
D.A. Craig Calloway
5 Episodes
Outer Range

Outer Range

TV | 2024
Judge Pettigrew
2 Episodes
Happy's Place

Happy's Place

TV | 2024
Jim Jackoway
2 Episodes
Fire Country

Fire Country

TV | 2023
Harlan Denbo
One Episode
Echoes

Echoes

TV | 2022
Victor McCleary
7 Episodes
This Is Us

This Is Us

TV | 2021
Arlo
One Episode
NCIS: Los Angeles

NCIS: Los Angeles

TV | 2021
Ret. U.S. Army General Richard Collins
One Episode
Messiah

Messiah

TV | 2020
Cameron Collier
5 Episodes
Tom Clancy's Jack Ryan

Tom Clancy's Jack Ryan

TV | 2019
Senator Mitchell Chapin
5 Episodes
Scandal

Scandal

TV | 2018
Lonnie Mencken
5 Episodes
The Resident

The Resident

TV | 2018
Joshua Williams
One Episode
Shooter

Shooter

TV | 2018
Ray Brooks
3 Episodes
The Romanoffs

The Romanoffs

TV | 2018
Ron Hopkins
One Episode
S.W.A.T.

S.W.A.T.

TV | 2017
Carl Luca
3 Episodes
11.22.63

11.22.63

TV | 2016
Arliss Price
One Episode
Manhattan

Manhattan

TV | 2015
Psychiatrist
One Episode
Extant

Extant

TV | 2014
Alan Sparks
13 Episodes
Bates Motel

Bates Motel

TV | 2014
Nick Ford
8 Episodes
Rizzoli & Isles

Rizzoli & Isles

TV | 2013
Jonathan McKnight
One Episode
Rectify

Rectify

TV | 2013
Senator Roland Foulkes
15 Episodes
The Glades

The Glades

TV | 2011
Trent Staley
One Episode
Law & Order: LA

Law & Order: LA

TV | 2010
Jeb Monroe
One Episode
Grey's Anatomy

Grey's Anatomy

TV | 2010
Gary Clark
4 Episodes
Fringe

Fringe

TV | 2010
Sheriff Velchik
One Episode
NCIS

NCIS

TV | 2010
Riley McCallister
3 Episodes
Numb3rs

Numb3rs

TV | 2010
Boyd Keene
One Episode
Ghost Whisperer

Ghost Whisperer

TV | 2009
Nolan
One Episode
FlashForward

FlashForward

TV | 2009
CIA Director Keller
One Episode
Sons of Anarchy

Sons of Anarchy

TV | 2009
Anthony Franklin
One Episode
The Mentalist

The Mentalist

TV | 2008
Sheriff Nelson
One Episode
Prison Break

Prison Break

TV | 2008
Herb Stanton
One Episode
Leverage

Leverage

TV | 2008
Judge Roy
One Episode
Criminal Minds

Criminal Minds

TV | 2007
Det. Yarbough
One Episode
The Nine

The Nine

TV | 2006
Pete Burton
3 Episodes
The Unit

The Unit

TV | 2006
Ron Cheals
One Episode
Close to Home

Close to Home

TV | 2006
Don Wheeler
One Episode
ER

ER

TV | 2005
Col. Ken Kilner
One Episode
Commander in Chief

Commander in Chief

TV | 2005
Congressman Wilcox
2 Episodes
Boston Legal

Boston Legal

TV | 2005
Dr. Robert McLean
One Episode
Crossing Jordan

Crossing Jordan

TV | 2004
Chris Benz
One Episode
LAX

LAX

TV | 2004
Alonso Mathews
One Episode
The Practice

The Practice

TV | 2004
Judge Robert Temple
One Episode
Without a Trace

Without a Trace

TV | 2002
Thomas Shannon
One Episode
Ally McBeal

Ally McBeal

TV | 2002
Dr. Colbert
One Episode
24

24

TV | 2001
Richard Walsh
One Episode
24

24

TV | 2001
Richard Welsh
One Episode
Diagnosis: Murder

Diagnosis: Murder

TV | 2001
Sheriff Buck O'Hara
One Episode
Boston Public

Boston Public

TV | 2001
Dr. Bernard Colbert
4 Episodes
Chicago Hope

Chicago Hope

TV | 2000
One Episode
JAG

JAG

TV | 1999
Commander Bradley
One Episode
Roswell

Roswell

TV | 1999
Philip Evans
One Episode
The West Wing

The West Wing

TV | 1999
Ron Butterfield
15 Episodes
The X-Files

The X-Files

TV | 1998
Patrol Captain Van Gelder
One Episode
The Shining

The Shining

TV | 1997
Daniel Edwards (uncredited)
One Episode
Millennium

Millennium

TV | 1997
County Prosecutor Calvin Smith
One Episode
One West Waikiki

One West Waikiki

TV | 1995
One Episode