For the 27th annual Santa Barbara International Film Festival, Rooney Mara opted to ditch her usual black attire and wore a gorgeously green Louis Vuitton dress from the pre-Fall 2012 collection. Everything from the rich hue to the tulip skirt to the pockets make this a frock worth drawing inspiration from for everything from a work meeting to cocktail party. For the former, just throw on a pair of black tights, booties, and a blazer to sharpen it up; then for the latter, ditch the tights and wear black strappy sandals like Rooney's Giambattista Valli pair. The most important essence to capture here, though, is the right shade of green. If the green is too bright, it won't be as chic, and if it's too dark, it can be drab. If you're just as inspired by Rooney's green frock as we are, shop 12 equally fabulous and unique green dresses below.