Mark Harmon & Pam Dawber

Mark Harmon has been receiving heaps of praise for his role as Leroy Jethro Gibbs in the long-running TV series NCIS, but he can also get credits for his lengthy relationship with Pam Dawber. The 69-year-old actor is only married once, and it looks like there is nothing that can end it.

Harmon and Dawber tied the knot in 1987. At the time, they were at the heights of their respective careers. The actor just finished his hit TV series St. Elsewhere, while his wife was part of the sitcom My Sister Sam. The couple did not let their big names affect their romance. Though these are yet to reveal their secret, it looks like their decision to make their relationship private has something to do with it. Even their wedding was “quiet and personal,” attended by only a small group of family and friends.