Kylie Jenner storms Forbes as the youngest ever self-made Billionaire with a whooping $900M

The business magazine said the social media star is on track to become "the youngest-ever self-made billionaire".

The fashion guru, the youngest of the Kardashian clan, started selling her own cosmetics three years ago.

Her most famous sibling, Kim Kardashian West, 37, has a notably lower net worth of $350m.

Ms Jenner, who is still currently not old enough even to legally drink alcohol in the US, will turn 21 in August as her Forbes cover edition hits newsstands.

"What her half-sister Kim Kardashian West did for booty, Jenner has done for full lips," Forbes writes, describing her famous pout.

Earlier this week Ms Jenner, a mother of one daughter named Stormi, announced she would stop receiving lip injections, known as dermal fillers.

She later launched her brand Kylie Cosmetics, which included a line of lip products designed to help customers make their lips look bigger through over-lining and filling.

Her cosmetics have proven exceptionally popular with fans, selling out almost instantly at every website re-stock and leading to server crashes.

Ms Jenner's company, which she wholly owns, is worth $800m, according to Forbes.

She is number 27 on Forbes' list of richest self-made women in America, leap-frogging Barbra Streisand ($400m), Beyonce Knowles ($335m) and Taylor Swift ($320m).

Ms Jenner is on track to become a billionaire earlier than Mark Zuckerberg, the founder of Facebook, who achieved that status at age 23.

Evan Spiegel, the owner of Snapchat, also became a billionaire in his early 20s, but it is unclear exactly when he met that goal.

"wow. i can't believe I'm posting my very own @forbes cover," she wrote to her 110m Instagram followers on Wednesday.

"thank you for this article and the recognition. I'm so blessed to do what i love everyday. i couldn't have dreamt this up!"