They are pretty much the longest-lasting couple in Hollywood!

Anna Kournikova shared a rare photo of herself with longtime boyfriend Enrique Iglesias and her little brother Allen on her 35th birthday, and we almost forgot that the two have been dating for almost two decades! The tennis pro and the singer have been dating since 2001, but they are super private about their personal life and relationship. Clearly that works for them!

The blonde Russian bombshell has been spotted with a diamond on her ring finger multiple times, so there are reports that claim the couple secretly married. It didn't sound like tying the knot meant anything to them, though!

"I’ve never really thought marriage would make a difference. Maybe it’s because I come from divorced parents, but I don’t think you love someone more because of a piece of paper," the crooner told Parade in 2012.

"It isn’t important to me. I’m in a happy relationship — that’s all that matters," the athlete echoed to Women's Health in 2011.

Still going strong!