Green Silk Satin Maxi Dress: Open Back Wedding, 'Atonement' Style Keira Knightley Green Vintage Evening Dress in Movie Atonement Atonement dress green wedding dress Long maxi dress with open back Backless, Cecilia in Atonement, green dress Keira Knightley Keira Knightley Same Style Green Vintage Evening Dress in Movie Atonement, Green S Keira Knightleys emerald green dress in Atonement (2007) has become one of the most iconic costumes in film history. Designed by Jacqueline Durran, the silk gown perfectly captured 1930s elegance 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