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On film, she's played a duchess, a queen, the Sugar Plum Fairy, and Coco Chanel. She also holds the honor of wearing one of the most iconic movie gowns of all time, that gorgeous green number in Atonement. And in real life, Keira Knightley is just as fabulous as all those fashionistas she played!

It's amazing how far she's come — from the teenager whose idea of red carpet dressing mostly involved crop-tops and casual pants. Nowadays, Keira is hailed as one of the most recognizable fashion icons in entertainment, and she's traded in her laid-back outfits for grand, princess-worthy confections that Coco herself would approve of. In fact, one of the most enduring designer-muse relationships in the industry is between Chanel and Keira, although she's also stepped out in equally glamorous Valentino and Erdem numbers.

Here, we follow Keira's transformation from an edgy teenager to a walking fairytale on the red carpet. Get ready to swoon!