Hilton says she’s never been more fulfilled than she is now as a grandmother to eight little ones: “I’m the happiest I’ve ever been” She’s a former star from Real Housewife of Beverly Hills, an entrepreneur and a philanthropist who spends much of her time traveling the world. But Kathy Hilton says she’s happiest as a grandmother — and she …

Kathy Hilton is one proud grandma! The Real Housewives of Beverly Hills star, 63, tells PEOPLE exclusively that she and husband Rick Hilton “are over the moon” after the birth of daughter Paris Hilton’s new baby boy. Paris and her husband, Carter Reum, shared the news on Tuesday. “Paris and Carter, we know you are going to be the most …