Mark Harmon has a brand new role! The 73-year-old may be best known for playing Leroy Jethro Gibbs on NCIS, but a rare family update has revealed he's now a grandfather. His daughter-in-law, Courtney ...
Actor Mark Harmon played Leroy Jethro Gibbs on NCIS for 19 seasons. The former CBS star became a first-time grandfather earlier in 2025. Mark's daughter-in-law Courtney Prather revealed she and ...
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