Maybe it's because we're used to seeing Keira Knightley in period-piece dramas, but when the actress hit the red carpet for her latest film, we couldn't help but draw a likeness between the beauty in Valentino and a character in an Austen novel. Sure, this project, Seeking a Friend For the End of the World, is far from the world of Jane Austen, but the ladylike elegance and intricacy of her nude-hued, floral-appliquéd gown had all the makings of an amazing costume. The difference was that Keira wore the gown effortlessly — making even her red floral headpiece look easy to pull off. She was also careful not to overdo the accessories, finishing the look with an understated pair of patent, nude pumps and avoiding any other jewels — save for her sparkly engagement ring. This is just the kind of lovely gown we hope Keira wears down the aisle. Click on to see every gorgeous angle.