Mark Harmon is one of those actors whose character is almost as well-known as the actor himself. Harmon landed the job of a lifetime as Leroy Jethro Gibbs on NCIS, making him one of the world’s most renowned faces.
Behind the scenes, though, Mark Harmon has had his share of difficulties, and his sister’s terrible death in 2018 was a devastating blow to the actor and his family. Mark Harmon has spent his whole adult life in the entertainment world.