Stars gathered at the Museum of Decorative Arts in Paris for the launch of the Louis Vuitton — Marc Jacobs: The Exhibition last night. The event, which showcases Marc's 15 years as the designer behind the luxury label, opens to the public tomorrow. The special preview brought out Sarah Jessica Parker and Dianna Agron, who also attended the Louis Vuitton runway show earlier today. Gwyneth Paltrow, in a tuxedo by the brand, chatted with Louise Roe about her menswear-inspired look on her way inside after traveling from London for the fete. Kristen Stewart rocked an animal-print dress and brought boyfriend Robert Pattinson along for the occasion. Rob and Kristen arrived separately, but over the weekend they shared a romantic meal in the City of Light. Also on hand to celebrate was model Natalia Vodianova, Karl Lagerfeld, and Harvey Weinstein.