Kylie Jenner becomes world's youngest billionaire

The youngest Kardashian family member is making her fortune from her best-selling cosmetics business.

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

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," Ms Jenner told Forbes.