Mark Harmon
Acting
Born: September 2, 1951 (age 75) · Burbank, California, USA
Highest Rated
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.
Known for
Fear and Loathing in Las Vegas
1998
Family Guy
1999
Freaky Friday
2003
Natural Born Killers
1994
NCIS
2003
Wyatt Earp
1994
Justice League: Crisis on Two Earths
2010
Freakier Friday
2025
Chasing Liberty
2004
The West Wing
1999
NCIS: New Orleans
2014
Moonlighting
1985
Photos (4)
Movies (43)
Freaky Friday
Ryan
Natural Born Killers
Mickey Knox in TV
Freakier Friday
Ryan
Fear and Loathing in Las Vegas
Magazine Reporter
Chasing Liberty
James Foster
Justice League: Crisis on Two Earths
Superman (voice)
Wyatt Earp
Sheriff Johnny Behan
The Last Supper
Dominant Male
Let's Get Harry
Harry
Stealing Home
Billy Wyatt
Summer School
Freddy Shoop
Crossfire Trail
Bruce Barkow
Magic in the Water
Jack Black
The Presidio
Jay Austin
Cold Heaven
Alex Davenport
Comes a Horseman
Billy Joe Meynert
Beyond the Poseidon Adventure
Larry Simpson
Sweet Bird of Youth
Chance Wayne
Certain Prey
Lucas Davenport
Flamingo Road
Fielding Carlyle
The Deliberate Stranger
Ted Bundy
Weather Girl
Dale
Tuareg: Desert Warrior
Gacel Sayah
Dear America: Letters Home from Vietnam
(voice)
Dillinger
John Dillinger
After the Promise
Elmer Jackson
Prince of Bel Air
Robin Prince
Worth Winning
Taylor Worth
Local Boys
Jim Wesley
For All Time
Charles Lattimer
I'll Remember April
John Cooper
Little Mo
Norman Brinker
Long Road Home
Ertie Robertson
And Never Let Her Go
Thomas Capano
Casualties
Tommy Nance
Fourth Story
David Shepard
The First to Go
Jeremy Hampton
Till There Was You
Frank Flynn
Sonic Boom
Student Controller
Getting Married
Howie Lesser
Intimate Agony
Tommy
The Amati Girls
Lawrence
Original Sins
Johnathan Franye
TV Shows (37)
NCIS
Leroy Jethro Gibbs · 435 eps
Family Guy
Leroy Jethro Gibbs (voice) · 1 eps
JAG
Leroy Jethro Gibbs · 2 eps
The West Wing
Simon Donovan · 4 eps
The Love Boat
Doug Bradbury · 3 eps
The Tonight Show with Jay Leno
1 eps
Chicago Hope
Jack McNeil · 96 eps
Adam-12
Officer Gus Corbin · 1 eps
NCIS: New Orleans
Leroy Jethro Gibbs · 4 eps
St. Elsewhere
Robert Caldwell · 59 eps
Emergency!
Ofcr. Dave Gordon · 1 eps
Moonlighting
Sam Crawford · 4 eps
Police Woman
Stanski · 1 eps
Police Woman
Paul Donin · 1 eps
NCIS: Origins
Older Leroy Jethro Gibbs (voice) (uncredited) · 16 eps
NCIS: Origins
Older Leroy Jethro Gibbs (uncredited) · 1 eps
NCIS: Origins
Older Leroy Jethro Gibbs · 5 eps
Laverne & Shirley
1 eps
The Legend of Tarzan
Bob Markham (voice) · 1 eps
The Hardy Boys / Nancy Drew Mysteries
1 eps
From the Earth to the Moon
Wally Schirra · 1 eps
Centennial
Captain John McIntosh · 12 eps
Reasonable Doubts
Det. Dicky Cobb · 44 eps
Delvecchio
Ronnie Striker · 1 eps
Charlie Grace
Charlie Grace · 9 eps
Flamingo Road
Field Carlyle · 37 eps
Goliath Awaits
Peter Cabot · 2 eps
Hallmark Hall of Fame
Charles · 1 eps
Harts of the West
1 eps
240-Robert
Thib Thibideaux · 13 eps
Strangers
Mark · 1 eps
The Deliberate Stranger
Ted Bundy · 2 eps
All's Fair
1 eps
The Dream Merchants
Johnny Edge · 3 eps
All or Nothing: The Michigan Wolverines
Narrator (voice) · 8 eps
And Never Let Her Go
Thomas Capano · 2 eps
Sam
Mike Breen · 6 eps
Self / Appearances (19)
The Tonight Show Starring Johnny Carson
Self · 1 eps
The Late Show with Stephen Colbert
Self - Guest · 1 eps
The Kelly Clarkson Show
Self · 1 eps
Saturday Night Live
Self - Host · 1 eps
The View
Self · 1 eps
The Late Late Show with James Corden
Self · 1 eps
Jimmy Kimmel Live!
Self · 1 eps
Golden Globe Awards
Self - Nominee · 3 eps
Golden Globe Awards
Self · 1 eps
The Bonnie Hunt Show
Self · 1 eps
Steve Harvey
Self · 1 eps
The Megan Mullally Show
Self - Guest · 1 eps
Entertainment Tonight
Self · 1 eps
The Arsenio Hall Show
Self · 1 eps
The Rosie O'Donnell Show
Self · 1 eps
The American West
Self · 8 eps
Joe Montana: Cool Under Pressure
Self - Narrator (voice) · 6 eps
NCISverse: The First 1,000
Self
The Wild
Self
