"2 years of creating a beauty and skincare brand jeez... that's a long time to keep a secret," Millie wrote on Instagram.
Millie continued her post by thanking her fans: "But now I can finally share the news with u all !! thanks for all the love and support you guys give me every single day."
Want hear even better news?
15-year-old Millie Bobby Brown's beauty label will specifically cater to Gen Z beauty needs. Yes, that's right, Millie has your back.
The girl is certainly qualified when it comes to what young people need for their faces - after finding fame on Stranger Things at 13, Millie has been sitting in makeup chairs since she became a teenager.
Not only that, but Millie consistently ~kills it~ when it comes to her red carpet beauty looks, whether it be the natural look or with bold bright colours, our girl is forever flawless.
The new line launches in 5 days, so you if your birthday's coming up you know what to wish for.