Millie Bobby Brown — Stranger Things to Beauty Mogul

Millie Bobby Brown vaulted from playing Eleven in Stranger Things at 12 to running a beauty empire at 21, proving Gen Z stars can transcend screen fame. By 15, she became the youngest UNICEF Goodwill Ambassador ever. At 16, she launched Florence by Mills, a clean beauty brand now in 10,000+ stores like Ulta and Boots. She banked $400 million combined from two Enola Holmes films, a figure 30% higher than the average child star's franchise earnings. While costars lag at conventions, Brown secured a multi-year Netflix deal worth $10 million-plus per project. Her early pivot to entrepreneurship is faster than the typical reinvention timeline by three years.