Mark Harmon

Known for

Acting

Born

September 2, 1951 (age 75)

Birthplace

Burbank, California, USA

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 Wi...

Best known work

Fear and Loathing in Las Vegas

1998

Family Guy

1999

Freaky Friday

2003

Natural Born Killers

1994

NCIS

2003

Wyatt Earp

1994

Freakier Friday

2025

Justice League: Crisis on Two Earths

2010

Chasing Liberty

2004

The West Wing

1999

Filmography

2025
Freakier Friday
as Ryan
2024
NCIS: OriginsTV
as Older Leroy Jethro Gibbs (voice) (uncredited) (16 episodes), as Older Leroy Jethro Gibbs (uncredited) (1 episode), as Older Leroy Jethro Gibbs (2 episodes), Executive Producer
2024
NCISverse: The First 1,000
as Self
2022
Joe Montana: Cool Under PressureTV
as Self - Narrator (voice) (6 episodes)
2019
The Kelly Clarkson ShowTV
as Self (1 episode)
2019
The Wild
as Self
2018
All or Nothing: The Michigan WolverinesTV
as Narrator (voice) (8 episodes)
2016
The American WestTV
as Self (8 episodes)
2015
The Late Show with Stephen ColbertTV
as Self - Guest (1 episode)
2015
The Late Late Show with James CordenTV
as Self (1 episode)
2014
NCIS: New OrleansTV
as Leroy Jethro Gibbs (4 episodes), Executive Producer
2013
The Arsenio Hall ShowTV
as Self (1 episode)
2012
Steve HarveyTV
as Self (1 episode)
2011
Certain Prey
as Lucas Davenport, Executive Producer
2010
Justice League: Crisis on Two Earths
as Superman (voice)
2009
Weather Girl
as Dale
2008
The Bonnie Hunt ShowTV
as Self (1 episode)
2006
The Megan Mullally ShowTV
as Self - Guest (1 episode)
2004
The Tony Danza ShowTV
as Self (1 episode)
2004
Chasing Liberty
as James Foster
2003
NCISTV
as Leroy Jethro Gibbs (435 episodes), Executive Producer
2003
Freaky Friday
as Ryan
2003
Jimmy Kimmel Live!TV
as Self (1 episode)
2002
Local Boys
as Jim Wesley
2002
Intimate Portrait: Pam Dawber
as Self