By Colleen Kratofil
Updated July 10, 2015 04:32 PM

When an heiress and an heir decide to tie the knot, you know the ring will be enormous, the venue will be fancy (yep, it’s Kensington Palace — you know, where Prince William and Princess Kate live) and the fashion will be serious. So Thursday night, when Nicky Hilton stepped out in three different long-sleeve white mini dresses (and sister Paris Hilton wore a thigh-high slit) ahead of her weekend nuptials to James Rothschild, we were fully paying attention.

Credit: Nicolas Genin/Abaca/Startraks


To greet guests landing in London, Nicky wore a lace long-sleeve Giambattista Valli mini with a magenta beaded midsection, with her hair down in loose waves. Paris was clad in a Jean Fares Couture drop-waist dress with red and sheer paneling. The duo posed in cute Instagrams with their “new British sis” Kate Rothschild.

Then for a pre-wedding lunch, Nicky wore a long-sleeve white dress from Valentino (also rumored to be her wedding dress designer) with laser-cut details (as seen in bridesmaid, Brooke Wiederhorn’s Instagram).

Paris, for her part, wore a black-and-white printed day dress with coordinating accessories.

And finally, Nicky changed into the fanciest variation of the look for the pre-wedding dinner Thursday night, a dress featuring lace embroidery and sheer netting around the faux turtleneck, with her hair pulled up back into a curled, elegant pony. But she wasn’t the only one at the bash looking chic.

Nicky Hilton and her fiance James Rothschild


Chelsea Clinton arrived with her husband Marc Mezvinsky wearing an understated emerald flared-sleeve dress with drop pendant necklace and peep toe pumps. But it was Naomi Campbell (!) who stunned in a dress that may be more stop-and-stare than the bride’s, selecting a shimmering gold mini with cutouts and equally sparkly heels.

And finally, Paris wore a sultry black sequined gown with deep V-neck and thigh-high slit (she’s got to get all the sexy out of her system before she dons her bridesmaid dress this weekend — she told PEOPLE she’ll be in “whatever she [Nicky] wants me to wear”).

In keeping with the high-class theme of the wedding, the couple’s registry has been reported by E! to total a crazy expensive $28,000 and includes the likes of four John Derian lamps ($1,300 apiece), $700 worth of books and a $300 toaster. But we could only find this (admittedly sketchy) Bloomingdale’s registry that includes items like a $150 lipstick sculpture (are we sure this isn’t Paris’s dream registry?).

What do you think of Nicky’s “pre-wedding” looks? Do you think her wedding dress will feature long sleeves? Share your thoughts in the comments below!

RELATED VIDEO: Nicky Hilton’s Go-To Looks

— Colleen Kratofil