Michael O'Neill
Known for: Acting
Born: May 29, 1947
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-dr…
Known for
Cold Call
2021
The Grim Sleeper
2014
The Stand at Paxton County
2020
A Quiet Little Marriage
2008
Beyond Betrayal
1994
Danger One
2018
Dallas Buyers Club
2013
ATF
1999
Victim of Love: The Shannon Mohr Story
1993
Clemency
2019
Dancer, Texas Pop. 81
1998
For Their Own Good
1993
American Crime
2004
Awake to Danger
1995
Dreamcatcher
2003
An Unremarkable Life
1989
Bride Hard
2025
Virtual Obsession
1998
Indivisible
2018
Flying Lessons
2010
The Gun in Betty Lou's Handbag
1992
War of the Worlds
2025
Green Zone
2010
Blind Justice
1994
The Sunchaser
1996
Jennifer Eight
1992
Standoff
1998
The Mod Squad
1999
Transformers
2007
Secondhand Lions
2003
Air
2023
The Legend of Bagger Vance
2000
Nothing But the Truth
2008
Bushwhacked
1995
Sea of Love
1989
Seabiscuit
2003
Ghost Story
1981
Around the Bend
2004
Lorenzo's Oil
1992
Traffic
2000
This Is Us
2016
JAG
1995
The X-Files
1993
J. Edgar
2011
Roswell
1999
Chicago Hope
1994
Ghost Whisperer
2005
The Glades
2010
Rizzoli & Isles
2010
24
2001
Extant
2014
FlashForward
2009
Law & Order: LA
2010
Diagnosis: Murder
1993
Bates Motel
2013
Crazy
2008
Manhattan
2014
The West Wing
1999
Sons of Anarchy
2008
The Mentalist
2008
Grey's Anatomy
2005
11.22.63
2016
One West Waikiki
1994
The Nine
2006
Echoes
2022
Rectify
2013
Fringe
2008
Scandal
2012
The Resident
2018
Prison Break
2005
NCIS: Los Angeles
2009
NCIS
2003
ER
1994
Commander in Chief
2005
The Unit
2006
Shooter
2016
Tom Clancy's Jack Ryan
2018
Criminal Minds
2005
Fire Country
2022
Outer Range
2022
Leverage
2008
The Romanoffs
2018
Without a Trace
2002
The Shining
1997
S.W.A.T.
2017
Crossing Jordan
2001
Messiah
2020
LAX
2004
Happy's Place
2024
Millennium
1996
Boston Public
2000
Ally McBeal
1997
The Practice
1997
Numb3rs
2005
Close to Home
2005
Happy Face
2025
Boston Legal
2004
Army Wives
2007
CSI: Miami
2002
Tracker
2024
Vegas
2012