Millie Bobby Brown was only 11 years old when most of her fans met her in the first season of Stranger Things –– but the actress is not so little anymore as she just celebrated her 21st birthday. Brown celebrated her special day on Wednesday,

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Millie Bobby Brown celebrated her 21st birthday with a bold new look. The Stranger Things actress recently dyed her hair blonde, sparking speculation that she might portray Britney Spears in the upcoming biopic about the singer’s life.