Mark Harmon

Mark Harmon

Thomas Mark Harmon (born September 2, 1951) is an American actor, producer and director. He is known for playing the lead role of Leroy Jethro Gibbs on NCIS (2003-2021), a role which has earned him six nominations at the People's Choice Awards including a win for Favorite TV Crime Drama Actor in 2017. Since 2008, he has also been a producer and executive producer of the show as well as its' spinoff series NCIS: New Orleans. His character of NCIS special agent Leroy Jethro Gibbs was introduced in a guest starring role in two episodes of JAG, and continued on the spinoff show NCIS.

He had a recurring role as Secret Service special agent Simon Donovan in a four-episode story arc in The West Wing in 2002, for which he received an Emmy Award nomination. One of his first national TV appearances (other than as an athlete) was in a commercial for Kellogg's Product 19 cereal with his father, Tom Harmon, its longstanding TV spokesman. Thanks to his sister Kristin's in-laws, Ozzie and Harriet Nelson, he landed his first job as an actor in an episode of Ozzie's Girls. He has been starring in television and film since the mid-1970s, after a career as a collegiate football player with the UCLA Bruins. He's been married to actress Pam Dawber since 1987 and they have 2 sons. His son, actor Sean Harmon, had a recurring role as a young Leeroy Jethro Gibbs on NCIS.

Acting

2025

2024

NCIS: Origins

Older Leroy Jethro Gibbs (uncredited)

2024

NCIS: Origins

Older Leroy Jethro Gibbs (voice) (uncredited)

2024

2019

2019

2018

2016

2015

2014

NCIS: New Orleans

Leroy Jethro Gibbs

2011

Certain Prey

Lucas Davenport

2010

2009

2008

2006

2004

2004

Chasing Liberty

James Foster

2003

NCIS

Leroy Jethro Gibbs

2003

2003

2002

Local Boys

Jim Wesley

2001

The Legend of Tarzan

Bob Markham (voice)

2001

Crossfire Trail

Bruce Barkow

2000

For All Time

Charles Lattimer

1999

The West Wing

Simon Donovan

1999

Family Guy

Leroy Jethro Gibbs (voice)

1998

1998

1997

1996

1995

JAG

Leroy Jethro Gibbs

1995

Charlie Grace

Charlie Grace

1995

The Last Supper

Dominant Male

1995

1994

Chicago Hope

Jack McNeil

1994

Natural Born Killers

Mickey Knox in TV

1994

Wyatt Earp

Sheriff Johnny Behan

1993

1992

Cold Heaven

Alex Davenport

1992

1991

Reasonable Doubts

Det. Dicky Cobb

1991

Fourth Story

David Shepard

1989

Worth Winning

Taylor Worth

1989

1988

Stealing Home

Billy Wyatt

1988

The Presidio

Jay Austin

1987

Summer School

Mr. Freddy Shoop

1986

1986

1986

1986

Prince of Bel Air

Robin Prince

1985

Moonlighting

Sam Crawford

1984

1982

St. Elsewhere

Robert Caldwell

1981

Goliath Awaits

Peter Cabot

1981

1981

Flamingo Road

Field Carlyle

1980

Flamingo Road

Fielding Carlyle

1979

240-Robert

Thib Thibideaux

1979

1978

Comes a Horseman

Billy Joe Meynert

1978

Centennial

Captain John McIntosh

1978

Little Mo

Norman Brinker

1978

Sam

Mike Breen

1977

The Love Boat

Doug Bradbury

1977

1977

1976

All's Fair

Unknown

1976

Delvecchio

Ronnie Striker

1976

1975

1974

1974

Police Woman

Paul Donin

1973

1972

Emergency!

Ofcr. Dave Gordon

1968

Adam-12

Officer Gus Corbin

1962

1951

1944

1944

Golden Globe Awards

Self - Nominee

Production

2024

NCIS: Origins

Executive Producer

2014

NCIS: New Orleans

Executive Producer

2011

Certain Prey

Executive Producer

2003

NCIS

Executive Producer

1995

Directing

2000

1994

Chicago Hope

Director

Infos

Full Name
Mark Harmon
Gender
Male
Date of Birth
9/2/1951
Also Known As

Thomas Mark Harmon

مارک هارمون

مارک هارمُن