Keira Knightley and James McAvoy in 'Atonement' (2007). The green dress which Keira Knightley wore in this movie has been named "the best of all time" by InStyle Magazine, exceeding some classics Isabel Marant Etoile Falone Dress in Green & Ecru FWRD Isabel Marant Louane Strapless Dress Blue Green Print Silk Viscose Blend Size 40 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 PART 1: The Green Atonement Dress #keiraknightley #atonement #fashioninfilm #costume #costumedesign #filmandtv #fashion #jacquelinedurran