Kim Kardashian's Younger Sister Overtakes Mark Zuckerberg To Become The Youngest Self-Made Billionaire of all time

Kylie Jenner is officially the youngest self-made billionaire of all time, snatching the title from Facebook founder Mark Zuckerberg. 

Jenner, 21, was finally given the title after months of speculation on Tuesday by Forbes as it unveiled its annual billionaires list. 

At 21, she is both the youngest self-made billionaire and the youngest billionaire on Forbes' 'young billionaires' list.