Forbes names Kylie Jenner the youngest self-made billionaire in history
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Forbes magazine on Tuesday named Kylie Jenner, 21, the youngest self-made billionaire in the world, surpassing Mark ZuckerbergMark Elliot ZuckerbergDemocrats urge YouTube to remove election misinformation, step up efforts ahead of Georgia runoff Democrats press Facebook, Twitter on misinformation efforts ahead of Georgia runoff Hillicon Valley: Facebook content moderators demand more workplace protections | Ousted cyber official blasts Giuliani press conference | Tech firms fall short on misinformation targeting Latino vote MORE.

An analysis of her company, Kylie Cosmetics, which is estimated to be worth $900 million, and her own personal financial holdings estimates Jenner to be at the $1 billion mark. Jenner is two years younger than Zuckerberg, the founder of Facebook, was when he left Harvard University to found his social media company.

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Jenner's surge in fortune is due largely in part to her brand's expansion in to physical storefronts last year, the magazine reports, noting that revenue for Kylie Cosmetics grew to $360 million over the year after her products began appearing in Ulta beauty stores.

“I didn’t expect anything. I did not foresee the future,” Jenner told Forbes. “But [the recognition] feels really good. That’s a nice pat on the back.”

Jenner's company, which was founded four years ago, now sells products in all 50 states as well as online, according to Forbes, and generated a massive wave of business for Ulta's stores.

“It sold out faster than we planned,” Ulta's senior merchandising Vice President, Tara Simon, told Forbes, adding that Ulta has yet to spend any money to market the brand.

“[Jenner’s] ability to communicate with well over 120 million people in a snap has a lot of power," Simon added.

Jenner told the magazine that she has no plans yet to sell control of her popular brand, and that she is currently focused on expanding its product line.

“I see [Kylie Cosmetics] going very far,” Jenner told Forbes. “I work really hard.”