Natali Tank A Line Dress Olive Flora Black and Green Floral Print Midi Dress Ulla Johnson Erica Romper Dress Olive Green Hazel & Olive Pre Sell Keira Knightley as Cecilia Green Dress Atonement LausenCrafts A Line Tank Dress Olive Hemp Clothing Australia Keira Knightley's infamous emerald green dress in Atonement (2007) was carefully designed to embody the characters personality. It symbolises temptation which is a major theme throughout the film, especially during the events