Michael O'Neill

Known for ActingBorn 1947-05-29 (age 79)Montgomery, Alabama, USA

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.Read more

Movies & web series

An Unremarkable Life

The Resident

Sons of Anarchy

The Mentalist

This Is Us

Criminal Minds

The X-Files

Fire Country

Grey's Anatomy

The West Wing

S.W.A.T.

Bates Motel

Fringe

Ghost Whisperer

Prison Break

Dallas Buyers Club

Rizzoli & Isles

Boston Legal

11.22.63

Tom Clancy's Jack Ryan

24

Tracker

ER

CSI: Miami

Roswell

Rectify

Leverage

On Yoga: The Architecture of Peace

Millennium

NCIS

Commander in Chief

The Practice

NCIS: Los Angeles

Boston Public

One West Waikiki

Victim of Love: The Shannon Mohr Story

Army Wives

Air

Messiah

The Unit

LAX

Shooter

Scandal

Without a Trace

Secondhand Lions

JAG

Manhattan

Crossing Jordan