Paris and Nicky Hilton are socialite royalty. The two sisters took over the fashion and party club scene in the early aughts. They have remained close all their lives and now hang out with their kids.

In the early 2000s, Paris and Nicky Hilton could be seen everywhere, taking their place in the social scene as the heiress great-granddaughters of Hilton Hotels founder Conrad Hilton. Paris was an ...