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Don't call her Dakota Fanning's kid sis anymore -- Elle Fanning, who stars in JJ Abrams's new sci-fi flick "Super 8," has a style that's far more precocious than her 13 years. While most tweens her age are stocking up on Abercrombie & Fitch and Forever 21, the Georgia-born actress (and professionally trained ballerina) counts Valentino as one of her favorite designers.

At the Hollywood premiere of "Somewhere," Fanning looked sweet and sophisticated in a swingy LBD straight from Valentino's Fall 2010 Couture. Glittery flats and a playful braid made her grownup look a lot more bold and breezy. At the 2011 Met Gala, Fanning chose her favorite Italian designer again--this time, she opted for a black bolero and sheer lace, accessorized with a bun.

Always the fashionista, Fanning has also favored the avant-garde looks of Rodarte, pairing a golden frock created by the Mulleavy sisters with metallic Nicholas Kirkwood heels. Fanning is a devotee of classic cuts as well--calling herself a fan of "'60s and '70s babydoll dresses," she recently channelled her own version of Twiggy in a beaded, ladylike Marchesa dress and Mary Jane pumps. Like any preteen, the self-described "fashion nerd" loves brightly colored party dresses. At the Venice Film Festival, she stepped out in a girly Marc Jacobs creation. Wearing natural makeup and a sweetheart neckline, Fanning looked as though she'd been taking cues from another fashion forward young lady: Taylor Swift.

In an industry where Disney tween queens reign supreme, Fanning has proved herself to be a serious actress and a darling of countless fashion designers (she's on a first-name basis with the creative forces behind Rodarte). With a new film -- December's "We Bought a Zoo"-- and countless red carpet appearances on the way, the sophisticate is bound to have more than a few designers vying for her attention.

Watch the video below to see her most recent red carpet appearance: