Mark Harmon
Acting
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 rec…
Also known as
Thomas Mark Harmon
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Known For
The Tonight Show Starring Johnny Carson
1962 · TV
The Late Show with Stephen Colbert
2015 · TV
NCIS
2003 · TV
Family Guy
1999 · TV
The Kelly Clarkson Show
2019 · TV
Saturday Night Live
1975 · TV
The View
1997 · TV
The Late Late Show with James Corden
2015 · TV
Jimmy Kimmel Live!
2003 · TV
JAG
1995 · TV
The West Wing
1999 · TV
The Love Boat
1977 · TV