The youngest sibling in the Kardashian-Jenner family, Kylie Jenner, is set to become the world’s first self-made billionaire.

Forbes features the 20-year-old on the cover of its August issue — and estimates her fortune at a whopping $900 million. By comparison, her older sister, Kim Kardashian West, has a fortune of approximately $350 million, Forbes also reported.

The magazine claims Jenner’s worth will cross the billion-dollar mark by next year. The current youngest self-made billionaire is Facebook creator Mark Zuckerberg, who joined the exclusive club when he was only 23 years old.

Jenner’s fortune comes from product endorsement deals, her reality television work, and her makeup company, Kylie Cosmetics, which is reportedly worth $800 million.

Jenner is the sole owner.

“I struggled for a minute with finding something to do on my own,” she told Forbes about the decision to start her own company.

As a teen she used the quarter of a million dollars that she made from modeling work to invest in her company. She created 15,000 lipstick kits — and it was off to the races. The 15,000 kits sold out in mere seconds in 2015.

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“Before I even refreshed the page, everything was sold out,” said Jenner.

Jenner gave birth to a daughter this year, Stormi, and she said she will likely one day pass the company along to her.

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PopZette editor Zachary Leeman can be reached at [email protected]. Follow him on Twitter.