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 Keira Knightley's stunning blue dress from Atonement, considered the most beautiful of all time, is making a comeback. 38 Atonement ~ That Green Gown ideas atonement, keira knightley, atonement dress Atonement dress, Keira Knightley, Green Dress UK Velvet Birdcage