Brown is no stranger to trying out new things — she even changed her middle name to Bobby from Bonnie. That experimental spirit has extended to her hair through the years. Still, while she's occasionally gone blonde, like at the October 2022 premiere of Enola Holmes 2, Brown has mostly stuck to her naturally brunette hair.

Some people may be thinking that Millie Bobby Brown's new locks are a 10 out of 10, but "Stranger Things" fans probably think she's more of an 11. Brown has gone through quite an evolution since she started filming the hit Netflix series when she was just 12 years old.

Millie Bobby Brown is standing up to critics who have commented on her appearance throughout her career -- and she's making it clear she's not here for the negativity.