When the Palace of Versailles is the destination, you really have to step up your fashion game!
The sisters both wore stunning gowns that highlighted their personal sense of style.
Khloé looked radiant in a champagne colored long-sleeved dress with silver sequined embroidery. Her tousled mane was curled to show off her ombré locks and frame her face. She sported barely there makeup and a simple gold necklace that was placed just above her cleavage.
Meanwhile, Kendall opted for an elegant navy silk dress with a high-high slit and minimal accessories.
But the lovely ladies weren't the only ones spotted looking fashion forward for the lavish event.
The mother of two stayed true to her untraditional dressing style, however, and decided to wear a cream-colored suit with ruffles to the dinner. Lord Disick was dapper in a pinstripe suit and a pair of retro sunglasses for the affair—but his signature scruff stayed!
The family was among an elite group of friends and other relatives who were all invited to celebrate Kimye's big day.
Event preparations, such as floral arrangement deliveries and setup for the formal dinner, were underway at the château early in the morning on Friday.
Cakes decorated with macaroons as well as bouquets filled with pink peonies, red roses and snapdragons were all seen being unloaded onto the premises.
Nothing but the crème de la crème for Kimye!
Watch the Congrats Kim & Kanye Marathon all this weekend on E!, and don't forget Keeping Up With The Kardashians premieres Sunday, June 8, at 9 p.m.