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 Keira Knightley's White Lace Slipdress Is Completely See Through High Neck Back Bow Dress in White LUCY IN THE SKY Keira Knightley's golden Gucci dress in 2006 : r rs_x Women's Elegant Halter Neck Backless Summer Dress Lightweight A Line Semi * * Shoulder Design, Machine Washable for Casual & Formal Occasions, Casual Summer Dresses, Intricate Embroidery, Evening