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Michael O'Neill

Michael O'Neill

Michael O'Neill 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.

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Movies Starring Michael O'Neill (39)

Bride Hard (2025)

Sam is a secret agent whose toughest mission to date is pleasing her bride-to-be best friend at a lavish destination wedding. When a team of mercenaries crashes the party and takes the guests hostage, Sam is thrown into a fight unlike any before — one wh ...

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Air (2023)

Discover the game-changing partnership between a then undiscovered Michael Jordan and Nike's fledgling basketball division which revolutionized the world of sports and culture with the Air Jordan brand. ...

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Cold Call (2021)

Christian, a brilliant businessman, deal-maker, and self-proclaimed master-of-the-universe, receives a phone call and an offer for which he can negotiate no terms. ...

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The Stand at Paxton County (2020)

A military veteran comes home to find her father harassed by a sheriff intent on confiscating the livestock on their ranch under shady pretenses. ...

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Clemency (2019)

Years of carrying out death row executions have taken a toll on prison warden Bernadine Williams. As she prepares to execute another inmate, Bernadine must confront the psychological and emotional demons her job creates, ultimately connecting her to the ma ...

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Indivisible (2018)

Upon returning from serving in the U.S. ...

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Danger One (2018)

While transporting a dying man to the hospital, two paramedics find a million dollars in cash sewn into his clothing. When the man dies, they decide to keep it, setting them on a path for a hellish night of violence and mayhem. ...

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The Grim Sleeper (2014)

Journalist Christine Pelisek helps law enforcement investigate the alleged serial killer known as the Grim Sleeper. ...

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Dallas Buyers Club (2013)

Loosely based on the true-life tale of Ron Woodroof, a drug-taking, women-loving, homophobic man who in 1986 was diagnosed with HIV/AIDS and given thirty days to live. ...

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J. Edgar (2011)

As the face of law enforcement in the United States for almost 50 years, J. Edgar Hoover was feared and admired, reviled and revered. But behind closed doors, he held secrets that would have destroyed his image, his career, and his life. ...

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Green Zone (2010)

During the U.S.-led occupation of Baghdad in 2003, Chief Warrant Officer Roy Miller and his team of Army inspectors are dispatched to find weapons of mass destruction believed to be stockpiled in the Iraqi desert. Rocketing from one booby-trapped and treac ...

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Nothing But the Truth (2008)

When reporter Rachel Armstrong writes a story that reveals the identity of a covert CIA operative, the government demands that Rachel reveal her source. She defies the special prosecutor and is thrown in jail. Meanwhile, her attorney, Albert Burnside argue ...

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A Quiet Little Marriage (2008)

A Quiet Little Marriage is the love story of Dax and Olive, who manage to find harmony even as they juggle family, romance and intimacy, but that all changes the night she asks him for a baby. Writer/director Mo Perkins' intense and profound, raw feature d ...

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Crazy (2008)

Crazy is the story of a legendary guitar player who emerged from Nashville in the 1950s. Blessed with incomparable, natural talent, Hank Garland quickly established his reputation as the finest sessions player in Nashville. ...

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Transformers (2007)

Young teenager Sam Witwicky becomes involved in the ancient struggle between two extraterrestrial factions of transforming robots – the heroic Autobots and the evil Decepticons. Sam holds the clue to unimaginable power and the Decepticons will stop at no ...

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Around the Bend (2004)

A tale of four generations of men, all of whom have had their offspring at a young age: a great-grandfather, a grandfather, a father in his twenties and a son who is about 7 years old. When the oldest member passes away, the trio heads out on the road toge ...

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American Crime (2004)

A news team hunts for a serial killer who stalks victims via videotape and then records the ghastly deed. ...

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Secondhand Lions (2003)

The comedic adventures of an introverted boy left on the doorstep of a pair of reluctant, eccentric great-uncles, whose exotic remembrances stir the boy's spirit and re-ignite the men's lives. ...

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Seabiscuit (2003)

True story of the undersized Depression-era racehorse whose victories lifted not only the spirits of the team behind it but also those of their nation. ...

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Dreamcatcher (2003)

Four boyhood pals perform a heroic act and are changed by the powers they gain in return. Years later, on a hunting trip in the Maine woods, they're overtaken by a vicious blizzard that harbors an ominous presence. Challenged to stop an alien force, the fr ...

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Traffic (2000)

An exploration of the United States of America's war on drugs from multiple perspectives. For the new head of the Office of National Drug Control Policy, the war becomes personal when he discovers his well-educated daughter is abusing cocaine within their ...

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The Legend of Bagger Vance (2000)

World War I has left golfer Rannulph Junuh a poker-playing alcoholic, his perfect swing gone. Now, however, he needs to get it back to play in a tournament to save the financially ravaged golf course of a long-ago sweetheart. Help arrives in the form of my ...

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ATF (1999)

In the wake of the tragic events at Waco, Texas where an armed conflict with armed militiamen broke out, agents of the federal government's Alcohol, Tobacco, and Firearms (ATF) carry out a clandestine mission within another militia operation that is possib ...

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The Mod Squad (1999)

Three youthful delinquents escape conviction for their crimes by teaming with the LAPD. ...

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Dancer, Texas Pop. 81 (1998)

Four guys, best friends, have grown up together in DANCER, TEXAS POP. 81, a tiny town in West Texas. Years ago, they made a solemn vow to leave town together as soon as they graduate. Now, it's that weekend and the time has come to "put up or shut up." The ...

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Virtual Obsession (1998)

If you were a brilliant young scientist diagnosed with only months to live, what choices would you make? To have faith that you were taken early for a reason and go quietly, or to use cryogenics to hope you could be cured someday in the future, or to downl ...

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The Sunchaser (1996)

A young half-Navajo convict dying of cancer forces a yuppie doctor to drive him to a magic healing lake. ...

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Bushwhacked (1995)

A inept courier realises he has been used by criminals to deliver money. On the run from both the criminals and police, he poses as a Scout leader and leads a scout group on a hike through the mountains. ...

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Awake to Danger (1995)

Recently awakened from a coma, a traumatized adolescent girl fights to remember the circumstances surrounding her mother's brutal death. But as the details slowly come into focus, a killer watches and waits. ...

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Beyond Betrayal (1994)

Joanne is married to Bradley, a cop who abuses her. One day she decides to run away and meets Sam, who has marital difficulties of his own. Bradley evetually tracks Joanne down, which leads to the death of Sam's wife. ...

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Blind Justice (1994)

Canaan, a mysterious gunfighter left nearly blind from Civil War combat, roams through Mexico with a baby he has sworn to protect. On his way to a town where a family will supposedly adopt the baby, Canaan passes through a border town where U.S. Cavalry of ...

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Victim of Love: The Shannon Mohr Story (1993)

When a woman dies in a supposed accident, her parents suspect their son-in-law of foul play. When the police begin to agree, the murder suspect vanishes. ...

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For Their Own Good (1993)

A factory worker gets an ultimatum from her employer that she agree to be sterilized or be fired. ...

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Lorenzo's Oil (1992)

Augusto and Michaela Odone are dealt a cruel blow by fate when their five-year-old son Lorenzo is diagnosed with a rare and incurable disease. But the Odones' persistence and faith leads to an unorthodox cure which saves their boy and re-writes medical his ...

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Jennifer Eight (1992)

John Berlin, a big-city cop from LA moves to a small-town police force and immediately finds himself investigating a murder. Using theories rejected by his colleagues, Berlin meets a young blind woman named Helena, whom he is attracted to. Meanwhile, a ser ...

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The Gun in Betty Lou's Handbag (1992)

A Southern librarian puts excitement in her life with a found murder weapon and a false confession. ...

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An Unremarkable Life (1989)

The close bond between two elderly sisters is threatened when one of them begins to have romantic feelings for a local mechanic. ...

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Sea of Love (1989)

Seen-it-all New York detective Frank Keller is unsettled - he has done twenty years on the force and could retire, and he hasn't come to terms with his wife leaving him for a colleague. Joining up with an officer from another part of town to investigate a ...

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Ghost Story (1981)

Four successful elderly gentlemen, members of the Chowder Society, share a gruesome, 50-year-old secret. When one of Edward Wanderley's twin sons dies in a bizarre accident, the group begins to see a pattern of frightening events developing. ...

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Movies Made By Michael O'Neill (2)

On Yoga: The Architecture of Peace (2017)

Based on Michael O'Neill's book of the same name, this documentary tells the story of the ten years the author spent photographing yoga's great masters. Created as a deep extension of the original book, the film poses very human questions from our current ...

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The Emperor's Club (2002)

William Hundert is a passionate and principled Classics professor who finds his tightly-controlled world shaken and inexorably altered when a new student, Sedgewick Bell, walks into his classroom. What begins as a fierce battle of wills gives way to a clos ...

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