But the 20-year-old wasn't sure how successful the product would be.
After her older sister Kim Kardashian was held at gunpoint last October during a traumatic Paris robbery in her hotel room, Jenner says during a confessional interview that she's trying to be more aware of who she lets into her inner circle.
The young makeup mogul may be on her way to becoming an industry powerhouse.
According to the duo, Kylie Cosmetics has amassed $420 million in retail sales since it launched 18 months ago.
In comparison, WWD has reported that Estée Lauder Cos. It took Tom Ford a decade to hit a half a million in revenue, just for a little comparison.
Kylie Cosmetics, which is only sold online, is now looking at opening her own stores. But admittedly, Kylie simply uses her social media accounts such as her Snapchat, to inform her potential customers.
That pace would mean Kylie could be the head of a billion-dollar business before her 25th birthday.
He went on: 'Kylie was right there by my side during all my chemo treatments, and together we are raising awareness through her products'.
Kylie's mother, Kris Jenner, provided the numbers to the publication, and revealed her desire to partner with a retailer in the future. "She is not a happy person to begin with and all this show did was solidify that to her fans", the source added.
Now nearly 2 years after its launch there are no signs of slowing down. It was everything I didn't know I wanted at my next birthday.
"Kylie said. 'If I request Tokyo, I just want Tokyo".
The eight-part series is set to follow the life of the reality star as she deals with running a business while maintaining a "normal" life and her close friendship with Woods.
"In the beginning I thought my brand had to be consistent and everything (had to) look the same and that was stressing me out", Kylie said.