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. 마크 하먼(1951년생, Burbank, California, USA) 는 배우로, 대표작으로 프리키 프라이데이 2, 프리키 프라이데이, 저스티스 리그: 크라이시스 온 투 어스가 있으며, 그 외에도 패밀리 가이, NCIS, 레이트 쇼 위드 스티븐 콜베어, The Kelly Clarkson Show, 조니 카슨의 투나잇 쇼, 웨스트 윙, Saturday Night Live, JAG, The Love Boat, The Late Late Show with James Corden, 지미 키멜 라이브!, 골든 글로브상 등 다양한 작품에 출연했다. (오뜨랑에서 실시간으로 번역된 한글 프로필도 확인할 수 있어요) 2025년 프리키 프라이데이 2에서 Ryan 역을 맡았다. 2024년 NCIS 오리진스에서 Older Leroy Jethro Gibbs (voice) (uncredited) 역을 맡았다. 2024년 NCIS 오리진스에서 Older Leroy Jethro Gibbs 역을 맡았다.