We spied Leighton Meester as Blair Waldorf on the Gossip Girl set last week – who’s going crazy about the upcoming pilot episode of the show’s final season? – toting Roger Vivier’s coveted Prismick  shoulder bag, an absolute Fall 2012 must-have.

Available this month at the brand’s Dubai Mall boutique, the Prismick beautifully adds edge to Meester’s soft brocade coat and complements her leather biker gloves.