How old is Millie Bobby Brown?
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Millie Bobby Brown: 30 Facts You (Probably) Didn't Know About The Star Of "Stranger Things"
2. How old is Millie Bobby Brown?
As of May 2019, Millie is 15 years old. Her birthday is on February 19. She has one older brother (Charlie), one older sister (Paige) and one younger sister (Ava). She's also the second youngest cast member on "Stranger Things" and she's only six months older than Noah Schnapp who plays Will Byers.