About
Mark Harmon is an American actor, writer, producer, television director, and former football player. He is widely recognized for his long-running role as Leroy Jethro Gibbs in the hit CBS series NCIS, where he also served as an executive producer. Prior to NCIS, Harmon gained recognition for his roles in shows like St. Elsewhere and Chicago Hope. His performances have earned him several nominations, solidifying his status as a prominent figure in television. Harmon's career spans decades, making him a respected and recognizable face in the entertainment industry.
Career Timeline
Early Success in 'St. Elsewhere'
His role on 'St. Elsewhere' provides significant exposure and critical acclaim.
Named People's Sexiest Man
The 'Sexiest Man Alive' title boosts his visibility and leads to more opportunities.
'Chicago Hope' Recurring Role
Mark makes recurring appearances in the successful television show.
'NCIS' Premieres
Harmon stars in NCIS, which becomes a massive hit and the defining role of his career.
'NCIS' Dominance Continues
'NCIS' remains a ratings juggernaut, making Harmon a highly paid and recognizable television star.
Executive Producer on 'NCIS'
Harmon's role expands to executive producer, increasing his influence and earnings.
Departure from 'NCIS'
After 18 seasons, Mark leaves his defining role as Leroy Jethro Gibbs.
Television Legacy Continues
Mark remains a highly respected television actor, producer, and director, remembered for his iconic role in NCIS.
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Last updated: February 24, 2026