Kim Kardashian’s Sister, 14, Poses in Skimpy Bikini

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Kendall Jenner — the 14 year-old half sister to Kourtney, Kim, and Khloe Kardashian — is growing up fast.

Recently signed to Wilhelmina Modeling Agency, Kendall posed in a super-skimpy string bikini for a sultry photo shoot on the beach. Her big sister Kim, naturally, posted the shots on her blog.

"They turned out sooo gorgeous!!" Kim, 29, wrote of the photos taken by Nick Saglimbeni. "I am so proud of Kendall. She's going to take over the modeling world… you just watch!"

The daughter of Kris and Bruce Jenner, Kendall landed an ad campaign with American clothing chain Forever 21 in January — and her famous siblings offered some pointers.

"I looked to Kim for posing advice," Kendall told E! News. "[Kourtney] said to put my own style into the clothes that I was wearing. I was a little nervous before the shoot, but after I started taking a couple of pictures it just flowed and it was so fun."

Tell Us: is Kendall too young to model in a two-piece?

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