Mark Harmon

ActorProducerDirector Sep 2 (age 74) Burbank, California, USA 1951–2025 (74 year career)

6.2 avg rating

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…

Known For

Film

Fear and Loathing in Las Vegas

Magazine Reporter

Film

NCIS

Leroy Jethro Gibbs

Film

Natural Born Killers

Mickey Knox in TV

Film

Freaky Friday

Ryan

Film

Justice League: Crisis on Two Earths

Superman (voice)

Film

Wyatt Earp

Sheriff Johnny Behan

Film

NCIS: New Orleans

Executive Producer

Film

Freakier Friday

Ryan

Filmography

Acting (98)

Movies (48)

Freakier Friday

2025

as Ryan

6.9

NCISverse: The First 1,000

as Self

The Wild

as Self

Certain Prey

as Lucas Davenport

Justice League: Crisis on Two Earths

as Superman (voice)

Weather Girl

as Dale

Chasing Liberty

as James Foster

Freaky Friday

as Ryan

Intimate Portrait: Pam Dawber

2002

as Self

Local Boys

as Jim Wesley

Crossfire Trail

as Bruce Barkow

And Never Let Her Go

as Thomas Capano

The Amati Girls

as Lawrence

For All Time

as Charles Lattimer

I'll Remember April

as John Cooper

Fear and Loathing in Las Vegas

as Magazine Reporter

Casualties

as Tommy Nance

The First to Go

as Jeremy Hampton

The Last Supper

as Dominant Male

Magic in the Water

as Jack Black

Original Sins

as Johnathan Franye

Natural Born Killers

as Mickey Knox in TV

Wyatt Earp

as Sheriff Johnny Behan

Cold Heaven

as Alex Davenport

Till There Was You

as Frank Flynn

Dillinger

as John Dillinger

Long Road Home

as Ertie Robertson

Fourth Story

as David Shepard

Shadow of a Doubt

as Charles Spencer

Sweet Bird of Youth

as Chance Wayne

Worth Winning

as Taylor Worth

The Presidio

as Jay Austin

Stealing Home

as Billy Wyatt

Summer School

as Mr. Freddy Shoop

Dear America: Letters Home from Vietnam

as (voice)

After the Promise

as Elmer Jackson

Prince of Bel Air

as Robin Prince

Let's Get Harry

as Harry

The Deliberate Stranger

1986

as Ted Bundy

6.2

Tuareg: Desert Warrior

as Gacel Sayah

Intimate Agony

as Tommy

Flamingo Road

as Fielding Carlyle

Beyond the Poseidon Adventure

as Larry Simpson

Comes a Horseman

as Billy Joe Meynert

Getting Married

as Howie Lesser

Little Mo

as Norman Brinker

Eleanor and Franklin: The White House Years

1977

as Robert Dunlap

4.4

Sonic Boom

1974

as Student Controller

4.5

Television (50)

NCIS: Origins

2024

as Older Leroy Jethro Gibbs (uncredited)

7.5

Joe Montana: Cool Under Pressure

2022

as Self - Narrator (voice)

6.5

The Kelly Clarkson Show

2019

as Self

6.4

All or Nothing: The Michigan Wolverines

as Narrator (voice)

The American West

as Self

The Late Show with Stephen Colbert

2015

as Self - Guest

6.1

The Late Late Show with James Corden

2015

as Self

5.2

NCIS: New Orleans

2014

as Leroy Jethro Gibbs

7.3

The Arsenio Hall Show

as Self

The Bonnie Hunt Show

as Self

The Megan Mullally Show

as Self - Guest

The Tony Danza Show

as Self

NCIS

as Leroy Jethro Gibbs

Jimmy Kimmel Live!

as Self

The Legend of Tarzan

as Bob Markham (voice)

And Never Let Her Go

as Thomas Capano

Family Guy

as Leroy Jethro Gibbs (voice)

7.4

The West Wing

1999

as Simon Donovan

8.2

From the Earth to the Moon

as Wally Schirra

The View

as Self

The Rosie O'Donnell Show

1996

as Self

3.9

JAG

1995

as Leroy Jethro Gibbs

7.3

Charlie Grace

1995

as Charlie Grace

Chicago Hope

as Jack McNeil

Harts of the West

The Tonight Show with Jay Leno

Reasonable Doubts

as Det. Dicky Cobb

The Deliberate Stranger

1986

as Ted Bundy

Moonlighting

as Sam Crawford

St. Elsewhere

as Robert Caldwell

Entertainment Tonight

as Self

Flamingo Road

as Field Carlyle

Goliath Awaits

as Peter Cabot

The Dream Merchants

as Johnny Edge

240-Robert

as Thib Thibideaux

Centennial

as Captain John McIntosh

7.7

Sam

1978

as Mike Breen

The Love Boat

1977

as Doug Bradbury

6.3

The Hardy Boys / Nancy Drew Mysteries

Laverne & Shirley

Delvecchio

as Ronnie Striker

All's Fair

Saturday Night Live

as Self - Host

Police Woman

as Paul Donin

Ozzie's Girls

Emergency!

as Ofcr. Dave Gordon

Adam-12

as Officer Gus Corbin

7.0

The Tonight Show Starring Johnny Carson

1962

as Self

7.5

Hallmark Hall of Fame

as Charles

Golden Globe Awards

as Self

Crew (7)

Movies (1)

Certain Prey

2011

Executive Producer

4.9

Television (6)

NCIS: Origins

Executive Producer

NCIS: New Orleans

Executive Producer

NCIS

Executive Producer

Boston Public

Director

Charlie Grace

Producer

Chicago Hope

1994

Director

7.2