Millie Bobby Brown turning 20 last year was already mind-blowing and a dose of reality that every child actor has to grow up sometime. Now that the Eleven actress is 21 years old, she made sure to share on Instagram how she celebrated by “smoking” a candle and rocking her mermaid look:

Millie Bobby Brown turned 21 on February 19, 2025. The Stranger Things actor has developed from a child actor with promising prospects to a fashion icon.

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,