"She's incredible, she's Mad Max." That's what Stranger Things kids Lucas and Dustin have to say about their gang's new recruit, Maxine, a no-bullshit California transplant who whips the boys' butts at the arcade and might as well be Rodney Mullen's long-lost little sister.
Mystery simmers beneath the redheaded tomboy's steely persona, but more intriguing than Max, you might say, is the girl behind her: Sadie Sink, a 15-year-old Broadway pro turned TV star.
"I don't really give a crap what you say about me," she told W Magazine recently, "and Max doesn't either." After five call-backs and a screen test, the Stranger Things 2 team deemed Sink a lock. Never heard of her? Consult our cheat sheet below to learn more: