AW.Bridal Mermaid Bateau Neckline Floor Length Sleeveless Satin Floral Bridesmaid Dresses Floral Dress Mottled Moss Green Size 4 Keira Knightley turned heads in a green tulle Valentino gown last night Keira Knightley at 'The Aftermath' premiere Kiera Knightlys Atonement dress that everyone wanted wasnt actually a dress Keira Knightleys green dress in Atonement (2008) was designed to embody desire, elegance, and envy. Flowing and sultry, it enhanced the passion of the library scene while its striking shade of The green dress which Keira Knightley wore in Atonement (2007) has been named "the best of all time" by InStyle Magazine, exceeding some classics as Audrey Hepburn's little black dress in Breakfast