It is from the film Atonement and worn by Keira Knightley.
From the Press Association: ‘The emerald green dress worn by Keira Knightley in Atonement has been voted the best film costume of all time.
‘The bias-cut, backless silk gown had fashion editors raving when it first appeared on screen last year.
‘Knightley’s character, Cecilia Tallis, wore it during a pivotal scene in Joe Wright’s period drama.
The survey was done for Sky Movies and British InStyle. Following Knightley’s dress were:
white dress worn by Marilyn Monroe, in The Seven Year Itch;
little black dress worn by Audrey Hepburn, in Breakfast at Tiffany’s;
skin-tight pants worn by Olivia Newton-John, in Grease;
blue gown worn by Kate Winslet, in Titanic;
tie and waistcoat combination worn by Diane Keaton, in Annie Hall;
satin corset worn by Nicole Kidman, in Moulin Rouge;
stockings and bowler hat worn by Liza Minnelli, in Cabaret;
gown worn by Cate Blanchett, in Elizabeth;
dresses worn by Vivien Leigh, in Gone with the Wind.
.
