Kendall Jenner, the statuesque 19-year-old, apparently has issues over how younger sister Kylie Jenner dresses and acts around with rumored boyfriend Tyga.

According to the latest issue of OK! magazine, Kendall Jenner and Kylie Jenner's feud is allegedly much more catty behind closed doors than what they try to portray to the world, as two loving sisters.

While Bruce Jenner's daughters used to be so close, that's not the case anymore and that's because of how Kendall Jenner managed to make a name for herself as a model, landing gigs for luxury brands like Calvin Klein.

"Kendall has a real career and is making an insane amount of money...Kylie thinks she's become super arrogant," the source claimed.

The two sisters were also reportedly feuding during Kanye West's recent fashion show where Tyga's rumored girlfriend was in a "foul mood" because she didn't like the outfit that Kanye West gave her, as well as her makeup.

"Kendall tried to lend support by telling Kylie, saying even she 'doesn't always feel pretty when she's working and that's a part of the art' but 'it rubbed Kylie the wrong way and she exploded, yelling, calling Kendall a know-it-all and telling her to back off. The whole place fell silent," the source claimed.

There's also the alleged issue of Kylie Jenner's rumored plastic surgeries, which also became one of the subjects of the feud with Kendall Jenner.

"Kendall thinks that Kylie looks ridiculous, and she doesn't hold back from telling her so. She also thinks its grotesque that Kylie has had so much work done, particularly at her age," the article said.

Hollywood Life reported that the changes to Tyga's rumored girlfriend came from the deep-seated insecurities of Kylie Jenner growing up.

"Kendal was always considered the pretty one while Kylie was totally overlooked. She's been seething with resentment for a long time," the source said.

"Kendall has had absolutely no work done and is flawlessly beautiful. Kylie had everything from butt injections to jaw surgery," they went on.