Jenner, 21, the half-sister of reality television stars Kim, Khloe and Kourtney Kardashian, made it onto the annual Forbes list of billionaires after debuting her Kylie Cosmetics online in 2015 with $29 lip kits containing matching lipstick and lip liner.
According to the outlet, she tied for fifth place with Jay-Z, who is also estimated to have a $900 million net worth.
Marketing is carried out through social media, primarily dependent on Ms Jenner's enormous following. "That's a nice pat on the back".
Other newcomers on Forbes' list include Spotify co-founders Daniel Ek and Martin Lorentzon, who are worth $2.3 billion and $3.1 billion, respectively.
"I had such a strong reach before I was able to start anything", Jenner said. "She's really falling for him", says the source. Forbes credits the company's success with its minuscule overhead and marketing costs which allow most of the profits to go right into Jenner's pocket.
She added: "It's the power of social media". She mostly runs the company using her iPhone, and if you follow her on Instagram, you will notice that she regularly promote new products from the company.
However, Jenner doesn't feel like anything has changed since becoming a billionaire. "She probably realized: 'If I want to get big, I've got to scale, and to do that, I need a partner.' Ultimately, she wants to grow her brand, and she needs this store presence to do that".
"If you're going to try and save yourself by going public, INSTEAD OF CALLING ME PRIVATELY TO APOLOGIZE FIRST, at least be HONEST about your story".