It looks like there might be more than just a sibling rivalry brewing between the Jenner sisters. There's a new report indicating that Kylie Jenner is growing "increasingly jealous" of her older sister Kendall and her modeling career.

Kylie Jenner Cleavage PHOTO From Secret 'Keeping Up With The Kardashians' Malibu Shoot 

According to British magazine Reveal on Monday, Kylie is having a hard time trying to find her "niche" while coping with her sister's success, as Kendall has managed to land lucrative modeling contracts in the fashion world, which include Givenchy, Marc Jacobs and Chanel.

"Kylie's growing increasingly jealous of Kendall and it's driving a wedge between them," a source close to the Jenners said, according to the Irish Independent.

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The source added, "Privately Kylie has been complaining that she needs to find a way into the spotlight. She feels like all of her siblings have a niche and she's left out. Mom Kris [Jenner] is trying to find ways to get Kylie in the public eye. She's her 'shy one' and Kris suggested acting classes, but Kylie hasn't taken to the idea."

Meanwhile, it looks as though Kendall might have had her biggest break in her career so far. Refinery29 reported on Tuesday that the reality television star and fashion model made it into the September issue on page 656.

The 18-year-old and aspiring supermodel made her major print moment in an instructional feature on scarf-wearing, although so far she's stayed rather mum about it on her social networking accounts. Jenner wore an ensemble by Alexander Wang for the shoot and was photographed by Patrick Demarchelier.

Tags: Kendall Jenner Kylie Jenner