Billionaire heiress Nicky Hilton set to wed billionaire heir James Rothschild

Today July 10th socialite, Paris Hilton's younger sister and billionaire heiress Nicky Hilton, 31, will marry James Rothschild, 30, a son of Europe's greatest and extremely wealthy banking family.

The wedding of the billionaire families will take place at Kensington Palace, UK. Nicki Hilton will be wearing a couture Valentino gown worth about £50k. James proposed to Nicki last year with an enormous eight-carat diamond engagement ring, estimated to be worth a cool £1 million, after a whirlwind romance (ring inset)

Nicki is pictured left at her hen night with her sister and friends. See photos from their pre-weddng party at St. James yesterday after the cut...

Paris and Nicki's parents and Naomi Campbell

Chelsea Clinton and husband