LOS ANGELES: Reality TV star and make-up mogul Kylie Jenner has become the world's youngest self-made billionaire, according to Forbes billionaires' list.

The 21-year-old founded and owns Kylie Cosmetics, the three-year-old beauty business that generated an estimated $360m in sales last year, reports bbc.com.

She reached the milestone earlier than Facebook founder Mark Zuckerberg who became a billionaire aged 23.

"I didn't expect anything. I did not foresee the future. But (the recognition) feels really good. That's a nice pat on the back," Kylie told Forbes.

HOLY MOLYYYYYYY https://t.co/0Y3C3M4VP2

— Kendall (@KendallJenner) March 5, 2019

The list shows Amazon's founder, Jeff Bezos, remains the world's richest man.

His fortune totals $131bn, according to Forbes, up $19bn from 2018. But the billionaires' combined worth is down from $9.1 trillion at $8.7tn.

Facebook founder Mark Zuckerberg's wealth is among those falling. It has dropped by $8.7 billion in the past year to $62.3 billion, according to the Forbes list.

His shares in Facebook at one point lost a third of their value as the company battled privacy scandals.

Of all the billionaires on the list only 252 are women, and the richest self-made woman is real estate mogul Wu Yajun of China, worth an estimated $9.4 billion.

The number of self-made women reached 72 for the first time, up from 56 a year ago.

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