She walked into the room, and time held its breath. Keira Knightley's emerald silk in Atonement (2007) wasn't just a costumeit was cinematic seduction. Named the best movie dress of all The green dress Kiera Knightley wore in Atonement is my Roman Empire. My life and the lives of countless millennial girls changed when I watched Atonement and saw THE Green Dress for A Dress of Envy Atonement I Get a Kick out of you Alexa Chung Just Re Created Keira Knightley's Iconic Atonement Dress Who What Wear Atonement Ball Gown Pocock Costumes Atonement' 10th anniversary: The inside story on that iconic green dress