
Michael O'Neill
- Known for
- Acting
- Born
- May 29, 1951 (age 75)
- Birthplace
- Montgomery, Alabama, USA
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.
Known For
Filmography

War of the Worlds
Movie · as Secretary of Defense Walter Crystal

Bride Hard
Movie · as Frank

Happy Face
TV · as D.A. Craig Calloway · 5 eps

Happy's Place
TV · as Jim Jackoway · 2 eps

Tracker
TV · as Buck Avery · 1 ep

Air
Movie · as Joe Dean

Echoes
TV · as Victor McCleary · 7 eps

Fire Country
TV · as Harlan Denbo · 1 ep

Outer Range
TV · as Judge Pettigrew · 2 eps

Cold Call
Movie · as Christian

The Stand at Paxton County
Movie · as Dell Connelly

Messiah
TV · as Cameron Collier · 5 eps

Clemency
Movie · as Chaplain David Kendricks

Indivisible
Movie · as Chaplain Rogers

Danger One
Movie · as Beckwith

The Resident
TV · as Joshua Williams · 1 ep

Tom Clancy's Jack Ryan
TV · as Senator Mitchell Chapin · 5 eps

The Romanoffs
TV · as Ron Hopkins · 1 ep

S.W.A.T.
TV · as Carl Luca · 3 eps

This Is Us
TV · as Arlo · 1 ep

11.22.63
TV · as Arliss Price · 1 ep

Shooter
TV · as Ray Brooks · 3 eps

The Grim Sleeper
Movie · as Detective Simms

Extant
TV · as Alan Sparks · 13 eps

Manhattan
TV · as Psychiatrist · 1 ep

Dallas Buyers Club
Movie · as Richard Barkley

Bates Motel
TV · as Nick Ford · 8 eps

Rectify
TV · as Senator Roland Foulkes · 15 eps

Scandal
TV · as Lonnie Mencken · 5 eps

Vegas
TV · as Mayor Ted Bennett · 4 eps

J. Edgar
Movie · as Senator McKellar

Green Zone
Movie · as Colonel Bethel

Flying Lessons
Movie · as Chief Dobbs

The Glades
TV · as Trent Staley · 1 ep

Rizzoli & Isles
TV · as Jonathan McKnight · 1 ep

Law & Order: LA
TV · as Jeb Monroe · 1 ep

FlashForward
TV · as CIA Director Keller · 1 ep

NCIS: Los Angeles
TV · as Ret. U.S. Army General Richard Collins · 1 ep

A Quiet Little Marriage
Movie · as Bruce

Nothing but the Truth
Movie · as CIA Director

Crazy
Movie · as Ralph Christianson

Sons of Anarchy
TV · as Anthony Franklin · 1 ep

The Mentalist
TV · as Sheriff Nelson · 1 ep

Fringe
TV · as Sheriff Velchik · 1 ep

Leverage
TV · as Judge Roy · 1 ep

Transformers
Movie · as Tom Banacheck

Army Wives
TV · as Reverend Bankerd · 2 eps

The Nine
TV · as Pete Burton · 3 eps

The Unit
TV · as Ron Cheals · 6 eps

Ghost Whisperer
TV · as Nolan · 1 ep

Grey's Anatomy
TV · as Gary Clark · 3 eps

Prison Break
TV · as Herb Stanton · 1 ep

Commander in Chief
TV · as Congressman Wilcox · 2 eps

Criminal Minds
TV · as Det. Yarbough · 1 ep

Numb3rs
TV · as Boyd Keene · 1 ep

Close to Home
TV · as Don Wheeler · 1 ep

Around the Bend
Movie · as Cowboy

American Crime
Movie · as Sheriff Smyth

LAX
TV · as Alonso Mathews · 1 ep

Boston Legal
TV · as Dr. Robert McLean · 1 ep

Dreamcatcher
Movie · as Gen. Matheson

Secondhand Lions
Movie · as Ralph

Seabiscuit
Movie · as Mr. Pollard

NCIS
TV · as Riley McCallister · 3 eps

Without a Trace
TV · as Thomas Shannon · 1 ep

CSI: Miami
TV · as Jerry Blackburn · 1 ep

24
TV · as Richard Walsh, Richard Welsh · 1 ep

Crossing Jordan
TV · as Chris Benz · 1 ep

The Legend of Bagger Vance
Movie · as O.B. Keeler

Traffic
Movie · as Lawyer Rodman

Boston Public
TV · as Dr. Bernard Colbert · 4 eps

ATF
Movie · as ATF Asst. Director Ben Walker

The Mod Squad
Movie · as Greene

Roswell
TV · as Philip Evans · 1 ep

The West Wing
TV · as Ron Butterfield · 15 eps

Dancer, Texas Pop. 81
Movie · as Mr. Lusk

Virtual Obsession
Movie

Standoff
Movie · as Cult Leader (Voice)

The Shining
TV · as Daniel Edwards (uncredited) · 1 ep

Ally McBeal
TV · as Dr. Colbert · 1 ep

The Practice
TV · as Judge Robert Temple · 1 ep

The Sunchaser
Movie · as Agent Moreland

Millennium
TV · as County Prosecutor Calvin Smith · 1 ep

Bushwhacked
Movie · as Jon Jordan

Awake to Danger
Movie · as Detective Brickman

JAG
TV · as Commander Bradley · 1 ep

Blind Justice
Movie · as Spencer Heymen

Beyond Betrayal
Movie · as Ray Pasquerello

Chicago Hope
TV · as Bill Wyzinski · 1 ep

One West Waikiki
TV · 1 ep

ER
TV · as Col. Ken Kilner · 1 ep

For Their Own Good
Movie · as Clark Thompson

Victim of Love: The Shannon Mohr Story
Movie · as Dick Britton

The X-Files
TV · as Patrol Captain Van Gelder · 1 ep

Diagnosis: Murder
TV · as Sheriff Buck O'Hara · 1 ep

The Gun in Betty Lou's Handbag
Movie · as Jergens

Jennifer Eight
Movie · as Serato

Lorenzo's Oil
Movie · as School Psychologist

An Unremarkable Life
Movie · as Michael

Sea of Love
Movie · as Raymond Brown

Ghost Story
Movie · as Churchill