Millie Bobby Brown has a brand new 'do ... In one snap, the camera focused on Brown's face-framing layers as she looked away from the lens while wearing a black bodycon dress.

In the snap, Brown showed off her new bleached blonde hair, which was cut in textured face-framing layers, while wearing a dark lip and a smokey eye. In the other two photos in the carousel ...

The “Stranger Things” actress went totally under the sea, with a themed look and cake for the milestone event.