Biography
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
all 85
TV Shows 44
Movies 41
Producer 2
Director 2
Bride Hard (2024)
Air (2023)
Fire Country (2022)
Echoes (2022)
Cold Call (2021)
The Stand at Paxton County (2020)
Council of Dads (2020)
Messiah (2020)
Clemency (2019)
Indivisible (2018)
The Romanoffs (2018)
Danger One (2018)
Tom Clancy's Jack Ryan (2018)
The Resident (2018)
S.W.A.T. (2017)
On Yoga the Architecture of Peace (2017)
This Is Us (2016)
11.22.63 (2016)
Manhattan (2014)
Extant (2014)
The Grim Sleeper (2014)
Dallas Buyers Club (2013)
Rectify (2013)
Bates Motel (2013)
Scandal (2012)
J. Edgar (2011)
Law & Order: LA (2010)
Rizzoli & Isles (2010)
The Glades (2010)
Green Zone (2010)
FlashForward (2009)
NCIS: Los Angeles (2009)
Leverage (2008)
A Quiet Little Marriage (2008)
The Mentalist (2008)
Fringe (2008)
Sons of Anarchy (2008)
Crazy (2008)
Transformers (2007)
The Nine (2006)
The Unit (2006)
Commander in Chief (2005)
Ghost Whisperer (2005)
Criminal Minds (2005)
Prison Break (2005)
Grey's Anatomy (2005)
Around the Bend (2004)
American Crime (2004)
NCIS (2003)
Secondhand Lions (2003)
Seabiscuit (2003)
Dreamcatcher (2003)
The Emperor's Club (2002)
Without a Trace (2002)
24 (2001)
Crossing Jordan (2001)
Traffic (2000)
The Legend of Bagger Vance (2000)
Roswell (1999)
The West Wing (1999)
ATF (1999)
The Mod Squad (1999)
Dancer, Texas Pop. 81 (1998)
Virtual Obsession (1998)
The Shining (1997)
The Sunchaser (1996)
JAG (1995)
Bushwhacked (1995)
Awake to Danger (1995)
Beyond Betrayal (1994)
ER (1994)
Chicago Hope (1994)
One West Waikiki (1994)
Blind Justice (1994)
Victim of Love: The Shannon Mohr Story (1993)
Diagnosis: Murder (1993)
The X-Files (1993)
For Their Own Good (1993)
Lorenzo's Oil (1992)
Jennifer Eight (1992)
The Gun in Betty Lou's Handbag (1992)
An Unremarkable Life (1989)
Sea of Love (1989)
Ghost Story (1981)
War of the Worlds
Ratings
Information
Known ForActing
GenderMale
Birthday1947-05-29 (76 years old)
Birth PlaceBaltimore, United States of America
CitizenshipsUnited States of America
ResidencesLos Angeles, United States of America
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