Jill St. John & Robert Wagner – 37 Years Together

Another couple on this list who both grow their affluence through acting careers is Jill St. John and Robert Wagner. She is known for starring in Diamonds Are Forever while he is known for roles in Hart to Hart and It Takes a Thief.

They started dating in 1982 and eventually got married eight years later. Prior to their marriage, St. John was divorced thrice. She is the stepmother of Wagner’s three kids from previous relationships. The 79-year-old St. John is now retired, but the 89-year-old Wagner is still pursuing acting and most recently appeared on the TV series NCIS.