10 Shocking Actors Who Are Unbelievably Rich

8) Mark Harmon, NCIS, $20 Million                                           (8 of 10)

8) Mark Harmon, NCIS, $20 Million                                           (8 of 10)

Mark Harmon has had an illustrious career since he came on to the small screen. He has starred in hit shows such as St. Elsewhere, Moonlighting, The West Wing, and now, NCIS.

Out of all the roles, he is most notable for playing Special Agent Leroy Gibbs on NCIS. It was due to him that the show was able to last 13 seasons and is going on its 14^th season.