The 20-year old star of Keeping Up with the Kardashians is likely to become “the youngest-ever self-made billionaire”, Forbes writes.
Jenner, half-sister of Kim Kardashian West, has amassed a $900m (£685m) fortune in less than three years the report said.
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Jenner’s Kylie Cosmetics makeup company, which launched two years ago, has sold more than more than $630m of makeup since.
Forbes conservatively values the company, which Jenner is a 100 per cent owner of, at $800m.
She has also earned millions from TV shows, dividends and endorsements like Puma shoes and PacSun clothes.
Her fortune puts that of older sister Kardashian West in the shade (estimated at $350m).
However, if Jenner is to listen to US business magnate Elon Musk, the “billionaire” tag can be a heavy one to bear.
Musk, whose engineers built a mini-submarine (ultimately unused) to help in the rescue of a football team stranded in a cave in Thailand, blasted the media this week for its use of the term “billionaire”.
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