Known for Acting
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.
Born
May 29, 1947 (age 79)
Birthplace
Montgomery, Alabama, USA
Filmography
44 films, 59 shows


The Emperor's Club
2002 · 1h 48m · US
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 close student-teacher relationship, but results in a life lesson for Hundert that will still haunt him a quarter of a century later.