Fashion Faceoff: Kendall Jenner vs. Jessica Biel

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"Keeping Up With Kardashians" co-star Kendall Jenner used to be best known as Kim, Kourtney, and Khloe Kardashian's little sis, but not anymore!

Now, the 17-year-old is a working model who recently wore the same high-fashion frock as leading lady Jessica Biel, 31.

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What they wore: A black Gucci Spring 2013 gown with ruffles at the halter neckline and along the open back.

When they wore it: Jenner rocked the dress during a March 1 photo shoot for the cover of Harper's Bazaar Arabia. For Biel, the November premiere of her movie "Hitchcock" in Beverly Hills was the perfect occasion to don the dramatic design.

[Related: Fashion Faceoff: Gwyneth Paltrow vs. Rihanna]

How they styled it: Jenner added a metallic choker and matching bracelet, as well as dark eye makeup. Biel accessorized with Jennifer Meyer earrings and a yellow and white Fendi handbag.

[Related: How Kendall and Kylie Jenner Handle the Haters]

Judge's scorecard: This is one sexy dress! Biel's updo is gorgeous, and keeping it out of the way puts more of the focus on her glam garment. However, Jenner looks amazing — maybe even a little too grown up for someone who's not yet old enough to vote!

Do you think Jenner's look is enough to take down Mrs. Timberlake in this round? Vote now!

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