The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' British Vogue Obsession in Green The Atonement Dress Closet Core Patterns The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' Vogue Anyone else still thinking about Keira Knightley's backless green dress from Atonement, 13 years later? At the link in bio, our style editor examines why the backless trend became an unlikely Atonement Movie Dress Prom Homecoming Holiday Formal Green Keira Knightly NIB! eBay