Kendall Jenner isn’t happy about Kylie Jenner's modelling career!

Sister feud alert!

We hear Kendall Jenner isn’t happy that her younger sister Kylie Jenner is trying to break into the modelling world!

Kendall Jenner and Kylie Jenner. Photo: Getty

After the 18-year-old was offered a spread in Vogue magazine, we hear Kendall, 20, lost it!

“Kylie hired a coach to help her work on her walk so she’ll be ready to kill it on the runway,” a source tells HollywoodLife.com.

“Kendall is supportive to an extent, but there
s always competition between these two, if Kylie starts booking a lot of stuff it will become an issue.

“Modelling is Kendall’s thing and it always has been. She doesn’t love that Kylie suddenly wants to copy her.”

But there’s more!

“It’s not just Vogue that’s come calling,” says the insider. “[Kylie’s] getting tons of offers to be on magazine covers and it’s making her adjust her life goals. She still wants to act but for the first time she’s really considering modeling. Growing up it only seemed like Kendall had the goods to be a model, but Kylie is getting such positive feedback she’s really considering it as a career possibility.”