Happy birthday! Mark Harmon turns 74 today

By Lori Macatee
Washington
Last updated on September 2, 2025

The iconic and legendary actor turns 74 on Tuesday, Sep. 2, 2025.

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Mark Harmon is celebrating his 74th birthday today. As a number of online tributes attest, he is one of the most acclaimed actors of his generation.

Popular actor Mark Harmon (Modern Times, Chicago Hope, NCIS, ...) has always liked to keep a bit of himself hidden from view. At 74th birthday, he remains a man of many facets.

Harmon, a cultural icon

Born Thomas Mark Harmon in Burbank on September 2, 1951, his career spans an arc over many different eras and tastes in American history. Harmon's not just a great actor, he's an inspiration, an icon and a successful business man. At this point in his career, there seems to be little Mark hasn't done.

And we've got a feeling the next 12 months are going to be even bigger and better for Mark Harmon as he promises more to come. After all, he's only 74.

Happy Birthday, Mark, you're the best!