Millie Bobby Brown Looks SO Different Celebrating Her 21st Birthday!

Millie Bobby Brown is growing up!

The Stranger Things actress hit a big milestone on Wednesday: she turned 21! OMG! And she wants everyone to know it! The Godzilla star took to Instagram to share a short video of herself lighting a heart-shaped birthday cake… And she looks SO different!

Instead of her signature brunette locks, she sported a Barbie-blond ‘do loosely braided and flowing over her exposed shoulders. She had on a low-cut green corset, long nails, and blue eyeshadow. And she didn’t just light her candle any ol’ way! She held it in her mouth like a cigarette as someone off camera lit it… We guess she’s really trying to let followers know she’s maturing! Ha!

She wrote “thx for the bday wishes… hi 21.” See (below):