“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.

I can no longer keep up with Millie Bobby Brown’s hair transformations. One day she’s rocking a full Pamela Anderson–inspired, messy blonde updo, and the next she’s promoting her line of hair and body mists with sleek,

Just ask Millie Bobby Brown, who has opted for a fresh bob after a brief flirtation with millennial pink hair. Masterminded by hairstylist Peter Burkill, a fair few inches have been eliminated from Brown’s mane,