Photo: Courtesy of Rodarte

This sibling rivalry is about to get heated. Elle Fanning, younger sister of Dakota, seems to be everywhere these days.  With a successful film career of her own (and 12-years old, no less), she stars in Sofia Coppola’s highly-acclaimed Somewhere and can be spotted off the big screen in The Curve of Forgotten Things for Rodarte’s spring 2011 collection.Elle is also coming into her own as a red carpet style icon. In a recent interview with Nowness, she cited her affinity for vintage fashion: “The 1950′s will always be my all-time favorite, but at the moment I’m adding in baby doll dresses from the ’60s and high-waisted shorts and pants from the ’70s.” Despite some very grown-up choices of Marchesa, Valentino Couture, and Marc Jacobs, this ingénue doesn’t forget the importance of a little youth and imagination: “When you lose believing in magic, you’re too grown-up and take yourself too seriously. Peter Pan had a point!” Here are some of her stand-out looks:

Photo: Getty Images. Wearing Rodarte

Photo: Getty Images. Wearing Marchesa

Photo: Getty Images. Wearing Marc Jacobs

Photo: Getty Images. Wearing Pendleton for Opening Ceremony
Photo: Getty Images. Wearing Valentino Couture