Kylie Jenner was just 10 years old when she made her debut on her family's reality television series Keeping up with the Kardashians. A decade on, the show is still going strong and its youngest star is now the famous family's highest earner. It emerged this week just how vast a chunk of the family's wealth belongs to the 20-year-old. Despite Kim's initial eclipsing fame, Forbes magazine says Kylie is now worth almost three times as much as her sister at an estimated $900m (£680m). The magazine lauded her for heading towards becoming one of the youngest "self-made" billionaires ever. Given her background, many online scoffed at the title, but the impressiveness of the speed of her business success is harder to mock. Kylie Cosmetics is by far her biggest earner. It's not sold in stores and does not advertise traditionally, because unlike other competitors it doesn't seem to need it.
