Atonement 2007 Movie Keira Knightley Green Dress Print of Original Painting Etsy The green dress worn by Keira Knightley in "Atonement" (2007) became an iconic symbol of the film's tragic love story. Designed by Jacqueline Durran, the dress was deliberately chosen to stand out 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 The green dress Keira Knightley wore in Atonement is my Roman Empire. Ever since I saw this movie Ive dreamed of having a dress just like it. And now I can finally live my #KieraKnightley fantasy.