Mark Harmonborn 1951

usually

Actor

Popularity

15.8

Famous

Biography

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.

Credits

Freakier Friday
Freakier Friday

2025

Comedy • Family • Fantasy

as Ryan

0
5.2
NCISverse: The First 1,000
NCISverse: The First 1,000

2024

Documentary • TV Movie

as Self

9
0.4
The Wild
The Wild

2019

Documentary

as Self

7
0.6
Certain Prey
Certain Prey

2011

Action • Crime • Drama • Mystery • TV Movie • Thriller

as Lucas Davenport

4.8
0.4
Justice League: Crisis on Two Earths
Justice League: Crisis on Two Earths

2010

Action • Adventure • Animation • Fantasy • Science Fiction

as Superman (voice)

7.3
1.9
Weather Girl
Weather Girl

2009

Comedy • Romance

as Dale

5.6
0.5
Chasing Liberty
Chasing Liberty

2004

Comedy • Romance

as James Foster

6.2
1.4
Freaky Friday
Freaky Friday

2003

Comedy • Family • Fantasy

as Ryan

6.5
5.8
Local Boys
Local Boys

2002

Drama

as Jim Wesley

6.3
0.6
Intimate Portrait: Pam Dawber
Intimate Portrait: Pam Dawber

2002

Documentary

as Self

0
0.1
And Never Let Her Go
And Never Let Her Go

2001

Crime • Drama • Mystery • TV Movie • Thriller

as Thomas Capano

6.6
0.4
Crossfire Trail
Crossfire Trail

2001

Action • Drama • Romance • TV Movie • Thriller • Western

as Bruce Barkow

6.3
0.7
The Amati Girls
The Amati Girls

2001

Drama • TV Movie

as Lawrence

2.5
0.2
For All Time
For All Time

2000

Drama • Science Fiction • TV Movie

as Charles Lattimer

6.3
0.4
I'll Remember April
I'll Remember April

1999

Drama • Family • War

as John Cooper

6.3
0.4
Fear and Loathing in Las Vegas
Fear and Loathing in Las Vegas

1998

Adventure • Comedy • Drama

as Magazine Reporter

7.2
4.3
Casualties
Casualties

1997

Drama • Thriller

as Tommy Nance

6.6
0.4
The First to Go
The First to Go

1997

Comedy

as Jeremy Hampton

0
0.2
The Last Supper
The Last Supper

1995

Comedy • Crime • Drama • Thriller

as Dominant Male

6.6
1.2
Magic in the Water
Magic in the Water

1995

Adventure • Drama • Family • Fantasy

as Jack Black

5.3
0.6
Original Sins
Original Sins

1995

Drama • Mystery • TV Movie • Thriller

as Johnathan Franye

4
0.3
Natural Born Killers
Natural Born Killers

1994

Crime • Drama • Thriller

as Mickey Knox in TV

7.1
4.4
Wyatt Earp
Wyatt Earp

1994

Action • Adventure • Drama • Western

as Sheriff Johnny Behan

6.8
2.4
Cold Heaven
Cold Heaven

1992

Drama • Mystery • Thriller

as Alex Davenport

4.6
0.5
Till There Was You
Till There Was You

1991

Adventure • Drama • Romance

as Frank Flynn

3.3
0.3
Shadow of a Doubt
Shadow of a Doubt

1991

Mystery • TV Movie • Thriller

as Charles Spencer

5.2
0.1
Long Road Home
Long Road Home

1991

Drama • TV Movie

as Ertie Robertson

5.3
0.2
Fourth Story
Fourth Story

1991

Drama • Mystery • Romance • TV Movie

as David Shepard

5.6
0.4
Dillinger
Dillinger

1991

Action • Crime • TV Movie

as John Dillinger

4.7
0.6
Worth Winning
Worth Winning

1989

Comedy • Romance

as Taylor Worth

5.2
0.4
Sweet Bird of Youth
Sweet Bird of Youth

1989

Drama • TV Movie

as Chance Wayne

5.7
0.3
Stealing Home
Stealing Home

1988

Drama • Romance

as Billy Wyatt

6.3
0.7
The Presidio
The Presidio

1988

Action • Crime • Mystery • Thriller

as Jay Austin

5.9
1.4
After the Promise
After the Promise

1987

Drama • TV Movie

as Elmer Jackson

7.7
0.6
Dear America: Letters Home from Vietnam
Dear America: Letters Home from Vietnam

1987

Documentary • War

as (voice)

7.1
0.6
Summer School
Summer School

1987

Comedy

as Mr. Freddy Shoop

6.4
1.2
Let's Get Harry
Let's Get Harry

1986

Action

as Harry

6.2
0.3
The Deliberate Stranger
The Deliberate Stranger

1986

Crime • Drama • Horror • TV Movie • Thriller

as Ted Bundy

6.2
0.4
Prince of Bel Air
Prince of Bel Air

1986

Comedy • Romance • TV Movie

as Robin Prince

4.7
1.1
Tuareg: Desert Warrior
Tuareg: Desert Warrior

1984

Action • Adventure

as Gacel Sayah

5.8
0.7
Intimate Agony
Intimate Agony

1983

Drama • TV Movie

as Tommy

4.3
0.4
Flamingo Road
Flamingo Road

1980

Drama • TV Movie

as Fielding Carlyle

0
0.2
Beyond the Poseidon Adventure
Beyond the Poseidon Adventure

1979

Action • Adventure • Drama

as Larry Simpson

5.1
0.9
Comes a Horseman
Comes a Horseman

1978

Drama • Romance • Western

as Billy Joe Meynert

6
0.7
Little Mo
Little Mo

1978

Drama • TV Movie

as Norman Brinker

7.5
0.3
Getting Married
Getting Married

1978

Comedy • Romance • TV Movie

as Howie Lesser

4
0.2
Eleanor and Franklin: The White House Years
Eleanor and Franklin: The White House Years

1977

Drama • TV Movie

as Robert Dunlap

5.1
0.3
Sonic Boom
Sonic Boom

1974

Comedy

as Student Controller

4.5
0.2

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