Topshop has launched a mysterious winter wonderland campaign starring a famous Hollywood actress.

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Topshop has launched an exclusive winter wonderland campaign starring a famous albeit yet unnamed actress.

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The brand is releasing a series of trailers over the next four days before the official world film premiere on December 4.

While Topshop is keeping silent on who the star of the film is, the marie claire office is already placing bets on who the girl in the sparkly dress might be.

You can share your own guess on Twitter via @Topshop_AU using the hashtag #whosthatgirl.

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Be sure to check back here for the full short film and a very special message for marie claire readers from the stylish star on Tuesday, December 4!