On Thursday, Jan. 13, the Kylie Cosmetics founder, 24, hit a major milestone

becoming the first woman in the world to hit over 300 million followers on Instagram

But Kylie's big sisters aren't too far behind her. Kim Kardashian is the closest to Kylie with over 279 million followers to her name

Manchester United superstar Cristiano Ronaldo leads the way with a whopping 389 million followers.

in 2019, Jenner's net worth was estimated at US$1 billion

making her, at age 21, the world's youngest self-made billionaire as of March 2019

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