War of the Worlds2025
As Secretary of Defense Walter Crystal
TMDb 4.0 / 10
Michael O'Neill
Born
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.
Filmography (42)
Air2023
As Joe Dean
TMDb 7.3 / 10
Dallas Buyers Club2013
As Richard Barkley
TMDb 7.9 / 10
Traffic2000
As Lawyer Rodman
TMDb 7.1 / 10
Bride Hard2025
As Frank
TMDb 5.5 / 10
Dreamcatcher2003
As Gen. Matheson
TMDb 5.7 / 10
Green Zone2010
As Colonel Bethel
TMDb 6.5 / 10
Sea of Love1989
As Raymond Brown
TMDb 6.6 / 10
Transformers2007
As Tom Banacheck
TMDb 6.8 / 10
J. Edgar2011
As Senator McKellar
TMDb 6.2 / 10
Jennifer Eight1992
As Serato
TMDb 6.1 / 10
Secondhand Lions2003
As Ralph
TMDb 7.2 / 10
ATF1999
As ATF Asst. Director Ben Walker
TMDb 5.8 / 10
Lorenzo's Oil1992
As School Psychologist
TMDb 7.1 / 10
Seabiscuit2003
As Mr. Pollard
TMDb 7.1 / 10
Nothing but the Truth2008
As CIA Director
TMDb 6.9 / 10
The Sunchaser1996
As Agent Moreland
TMDb 6.3 / 10
The Legend of Bagger Vance2000
As O.B. Keeler
TMDb 6.6 / 10
Ghost Story1981
As Churchill
TMDb 6.0 / 10
The Mod Squad1999
As Greene
TMDb 4.4 / 10
Cold Call2021
As Christian
Blind Justice1994
As Spencer Heymen
TMDb 5.3 / 10
Danger One2018
As Beckwith
TMDb 6.1 / 10
Bushwhacked1995
As Jon Jordan
TMDb 5.4 / 10
Indivisible2018
As Chaplain Rogers
TMDb 7.0 / 10
Around the Bend2004
As Cowboy
TMDb 5.9 / 10
The Grim Sleeper2014
As Detective Simms
TMDb 4.9 / 10
Clemency2019
As Chaplain David Kendricks
TMDb 6.3 / 10
Flying Lessons2010
As Chief Dobbs
TMDb 5.6 / 10
The Gun in Betty Lou's Handbag1992
As Jergens
TMDb 5.1 / 10
The Stand at Paxton County2020
As Dell Connelly
TMDb 5.9 / 10
Crazy2008
As Ralph Christianson
TMDb 5.5 / 10
Dancer, Texas Pop. 811998
As Mr. Lusk
TMDb 7.0 / 10
Standoff1998
As Cult Leader (Voice)
TMDb 6.0 / 10
For Their Own Good1993
As Clark Thompson
TMDb 6.3 / 10
American Crime2004
As Sheriff Smyth
TMDb 3.7 / 10
Victim of Love: The Shannon Mohr Story1993
As Dick Britton
TMDb 7.6 / 10
A Quiet Little Marriage2008
As Bruce
TMDb 5.1 / 10
Awake to Danger1995
As Detective Brickman
TMDb 6.8 / 10
Beyond Betrayal1994
As Ray Pasquerello
TMDb 6.5 / 10
An Unremarkable Life1989
As Michael
TMDb 10.0 / 10
Virtual Obsession1998
TMDb 4.1 / 10
Filmography and biography: TMDb