Kylie Jenner, half sister of Kim Kardashian and daughter of former Olympic gold medalist Bruce Jenner, has a net worth of $900 million. At 20 she's well on her way to become the youngest self-made billionaire toppling Mark Zuckerberg. She runs her own cosmetics company Kylie Cosmetics, is a mother and reality TV star and has featured on the Forbes list of the world's richest entertainers for this year. Watch Businesstoday.In's video to find out how she made her millions.