Atonement' 10th anniversary: The inside story on that iconic green dress The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' British Vogue The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' Vogue Heres how I made the green Atonement dress for @gremlita ! This was truly oje of the most special projects Ive taken on for such a joyful occasion. I learned so much along the way and I am 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