How old is Millie Bobby Brown?
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Millie Bobby Brown: 32 facts you (probably) didn't know about the Stranger Things star
2. How old is Millie Bobby Brown?
Millie is 17 years old. Her birthday is on February 19th. She has one older brother (Charlie), one older sister (Paige) and one younger sister (Ava). She's also the second youngest main cast member on 'Stranger Things' and she's only six months older than Noah Schnapp who plays Will Byers. [@milliebobbybrown via Instagram]