8 Long-Term Celebrity Couples Who Never Got Married

Vin Diesel and Paloma Jiménez have three children together but never felt the need to formalize their relationship with a marriage certificate. They have also kept their romance very private, with Diesel stating, "I'm not gonna put it out there on a magazine cover like some other actors. I come from the Harrison Ford, Marlon Brando, Robert De Niro, Al Pacino code of silence."