Millie Bobby Brown Reveals How Shaving Her Head Led to the Creation of Her Beauty Line

Brown is no stranger to bringing her nail know-how to the movie set — for the most part. "I'm filming [Enola Holmes Mysteries] right now, so I can't have any [fake] nails on. Enola Holmes does not have crazy nails. Eleven does not have crazy nails. I can assure you, she does not go to the nail salon and like, OK, ready, go," she said, laughing.

There was one slight exception, however: "In Godzilla vs. King Kong [Editor's note: the film is slated to hit theaters in 2020], I wanted my character to have army green nails so I brought the idea to set and they ran with it. She's cool. She's very much — Madison Russell is very much that tomboyish color. I felt like that was her."