Michael O'Neill
Acting
Born: May 29, 1947
From: Montgomery, Alabama, USA
Credits: 30 titles
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
| Title | Character | Year | Rating |
|---|---|---|---|
| War of the Worlds | Secretary of Defense Walter Crystal | 2025 | 4.139 |
| Bride Hard | Frank | 2025 | 5.6 |
| Air | Joe Dean | 2023 | 7.284 |
| Indivisible | Chaplain Rogers | 2018 | 6.884 |
| Danger One | Beckwith | 2018 | 6.1 |
| The Grim Sleeper | Detective Simms | 2014 | 4.9 |
| Dallas Buyers Club | Richard Barkley | 2013 | 7.916 |
| Green Zone | Colonel Bethel | 2010 | 6.49 |
| A Quiet Little Marriage | Bruce | 2008 | 5.1 |
| Nothing But the Truth | CIA Director | 2008 | 6.955 |
| Crazy | Ralph Christianson | 2008 | 5.525 |
| Transformers | Tom Banacheck | 2007 | 6.822 |
| Around the Bend | Cowboy | 2004 | 5.981 |
| Dreamcatcher | Gen. Matheson | 2003 | 5.637 |
| Secondhand Lions | Ralph | 2003 | 7.196 |
| The Legend of Bagger Vance | O.B. Keeler | 2000 | 6.599 |
| Traffic | Lawyer Rodman | 2000 | 7.085 |
| ATF | ATF Asst. Director Ben Walker | 1999 | 5.75 |
| Dancer, Texas Pop. 81 | Mr. Lusk | 1998 | 6.964 |
| Virtual Obsession | 1998 | 4.125 | |
| The Sunchaser | Agent Moreland | 1996 | 6.311 |
| Bushwhacked | Jon Jordan | 1995 | 5.395 |
| Blind Justice | Spencer Heymen | 1994 | 5.15 |
| For Their Own Good | Clark Thompson | 1993 | 6.286 |
| Victim of Love: The Shannon Mohr Story | Dick Britton | 1993 | 7.643 |
| The Gun in Betty Lou's Handbag | Jergens | 1992 | 5.118 |
| Jennifer Eight | Serato | 1992 | 6.071 |
| An Unremarkable Life | Michael | 1989 | 10.0 |
| Sea of Love | Raymond Brown | 1989 | 6.616 |
| Ghost Story | Churchill | 1981 | 6.024 |
| Known for | Acting |
| Credits | 30 |
| Born | 1947 |
| From | Montgomery, Alabama, USA |