Cat Fight! Supermodel Kendall Jenner Furious Sister Kylie Jenner Landed Vogue Cover First

On an episode in the fourth season of Keeping Up With The Kardashian's, back when Kendall was only 14-years-old, Kylie blew a gasket on camera when their mom, Kris Jenner, said she would help her daughter become a model. 

It was clear the mini mogul was jealous of her 20-year-old sister, even back then. "It’s just going to get to her head and all of us are going to be in her little throne listening to her.”

But now, Kylie is well past that stage, and even though Kendall has become an wildly successful supermodel, her baby sister is zooming past her in popularity - with over a million more followers on Instagram.

However, Kendall is not at all happy with the sudden shift, especially now that the Prada wearing devil herself, Vogue editor-in-chief Anna Wintour, has stood up and taken notice of the youngest Jenner.

Kendall has graced the cover of Vogue Japan, France, and Brazil - but never America, which is an accolade she's been gunning for. And now, according to a source at RadarOnline.com, the coveted cover is going to Kylie for a spread in the magazine's January 2016 issue. 

"She could not believe that Kylie was chosen for the U.S. version of Vogue while she was given the foreign one." And to add salt to the wound, Tyga's girlfriend posed for the spread with Kendall's bestie and fellow model, Bella Hadid.

"Kendall legitimately thinks that Kylie is trying to steal her friends and her life and she cannot stand it anymore." 

Even though their big sister Kim Kardashian told E! News that the two sisters aren't fueding, Even though their big sister Kim Kardashian told E! News that the two sisters aren't fueding, sources reveal their relationship is anything but solid, saying "Kim knows that Kendall and Kylie's growing animosity towards each other is worse now more than ever, but Kris pushed her to say that nothing's wrong."