Mark Harmon and Pam Dawber – Together For 34 Years
It looks as though when Mark Harmon makes a decision, he thinks about it well beforehand, as both his marriage and career have been successful for years! Since 2003 we’ve been getting to know him as Leroy Jethro Gibbs on the NCIS series; however, he’s been acting since the ‘70s.

In his 30s, he fell on one knee and proposed to Pam Dawber, who also happens to be an actress. According to Woman’s World, the reason why they’ve lasted that long is because they simply waited for the right time to get married. They’ve had two sons, one in 1988 and the youngest in 1992.