Millie Bobby Brown just switched up her hair again, debuting her darkest color yet. The Stranger Things star debuted a bold new 'do at the 2025 Miami Open on Thursday, March 27, while attending the women's semifinals with her husband, Jake Bongiovi, and his father, singer Jon Bon Jovi.

“Stranger Things” actress Millie Bobby Brown, 21, made a dramatic hair change, swapping her platinum locks for her original deep brunette shade. Quite the beauty risk-taker, the starlet debuted her fresh new tresses on Thursday at the semi-final of the Miami Open, which was held at Hard Rock Stadium.

Over the past few months, while promoting her new Netflix movie, The Electric State, Millie Bobby Brown faced a ton of awful commentary about her appearance — with many unkindly suggesting that her hair, makeup, and styling made her look like she was aging “badly.”