Atonement: Keira Knightley's Green Dress Clothes on film Keira Knightley Source on Instagram: I've always found these dresses quite similar, but the green dress from 'Atonement' will forever be my favorite. Which one do you 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 Keira Knightley wearing a green dress created by costume designer Jacqueline Durran in the 2007 film 'Atonement' : r whatthefrockk Atonement' 10th anniversary: The inside story on that iconic green dress The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' Vogue