The story behind Keira Knightley's green dress in Atonement Feedc The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' British 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 38 Atonement ~ That Green Gown ideas atonement, keira knightley, atonement dress