20-year-old Kylie Jenner becomes the youngest self-made billionaire in US

Although Kylie Jenner became popular as Kim Kardashian West's younger sister, the social media star and cosmetics mogul's net worth is more than twice that of her sister's.

Kylie Cosmetics' 20-year-old Founder Kylie Jenner, with a net worth of $900 million, is the youngest member on Forbes list of America's richest self-made women released on Wednesday.

Kylie, who appeared on the list for the very first time, amassed the fortune in less than three years. Roofing supply company ABC Supply's Diane Hendricks topped the list with $4.9 billion.

Jenner and West have both built their empires by harnessing social media. The young mom has sold $630 million worth of makeup since she launched Kylie Cosmetics in 2016, including an estimated $330 million in 2017, Forbes reports. The magazine values her company at worth nearly $800 million -- and Jenner owns 100 percent of it.