What a party! Forget the front row for a second, it's all about the post-runway party for spotting the best celebrity style on the ground at Paris Fashion Week. An incredibly well-dressed crowd gathered to fête Marc Jacobs, who, riding on the back of his dramatic A/W '12 collection preview, was the guest of honour at the Louis Vuitton — Marc Jacobs: The Exhibition opening soirée in Paris. Gwyneth Paltrow, Kristen Stewart (who is becoming quite the fashion darling) and Sarah Jessica Parker were on hand, as were a slew of the fashion industry's big-hitters. Step inside to see all the party pics!