She’s been laying low as of late, but Keira Knightley is about to appear in a new short film from Chanel called “Coco Mademoiselle.” The “Pirates of the Caribbean” babe will play the title role- a modern-day Coco Chanel whose mystery, daring and rebelliousness are at the heart of her charm- as she promotes the scent of the same name. Keira told press, “For me, Gabrielle Chanel is an icon and there was an...