The A-list crowd was in full attendance at last night's Prada and The Great Gatsby soiree celebrating the opening of a special Dress Gatsby exhibition showcasing costumes featured in the film (in theaters May 10) designed by Miuccia Prada and costume designer Catherine Martin. The celebrity set was dressed in chic party attire with leading lady Carey Mulligan taking the spotlight in an elegant black long-sleeved Prada dress highlighting a ruffled detail down the side. Meanwhile, Maggie Gyllenhaal opted for the opposite side of the color spectrum in the brand's white silk ruffled dress paired with deco-inspired statement earrings and silver platform sandals. Meanwhile, Katy Perry donned a purple printed Prada frock and Isla Fisher wore a sweet blush pink number. Click on for an up close and personal breakdown of every single look.