Keira Knightley wearing a green dress created by costume designer Jacqueline Durran in the 2007 film 'Atonement' : r whatthefrockk Keira Knightley's emerald green dress in Atonement (2007) is one of the most iconic costumes in modern cinema. Designed by Jacqueline Durran, this silk gown became a symbol of elegance, passion, and The Story Behind Keira Knightley's Emerald Green Slip Dress From 'Atonement' Vogue Atonement: Keira Knightley's Green Dress Clothes on film