It may have been raining on the red carpet, but that did not stop our favorite stars from attending the premiere of The Great Gatsby at the opening ceremony to this year's Cannes Film Festival. From Carey Mulligan's sleek and streamlined Dior Haute Couture gown to Cara Delevingne's ultrasexy body-con number from Burberry, these chic starlets weren't afraid to fete this year's fest with a level of glam that could only be surpassed by Jay Gatsby himself. A look at all of these gowns and more, here, in the gallery.