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 Keira Knightleys green dress in Atonement , To assemble the wardrobe of the characters, director Joe Wright called on Jacqueline Durran with whom he had worked on the mythical film, Pride and Dark Green Wedding Dress Sweetheart Sparkly Ball Gown Gothic Forest Green Ball Gown with Textured Ruffle Accents Green Evening Dress with Bow Tie Belt Plus Size Size 2 Teal Green Kiera Knightley's iconic emerald gown from 'Atonement' remains one of cinema's best fashion moments. Here, see where it ranks on our roundup of the most stunning period costumes ever seen on film: