Since Stranger Things premiered in 2016, its teen and tween stars have become bona fide stars. This is especially true of the younger contingent of Hawkins kids, played by Millie Bobby Brown, Finn Wolfhard, Gaten Matarazzo, Caleb McLaughlin, and Noah Schnapp. Any adult who says they would turn down the chance to play Dungeons & Dragons with this crew is a liar, and probably should be turned in to Sheriff Hopper for investigation. In season two, 15-year-old Sadie Sink joins the cast as Max, who recently moved to Hawkins from San Diego and kind of sounds like every girl's dream childhood BFF — a "skater punk girl" who drives all the boys crazy. Here, everything you need to know about the newest and possibly coolest resident of Hawkins.

1. Sadie was born in Texas in 2002. She currently lives with her family in New Jersey.

2. She's had roles on Unbreakable Kimmy Schmidt, Blue Bloods, and The Americans, and played Suzanne in the first (and only) season of American Odyssey. She also appeared in the movies The Bleeder and The Glass Castle.

3. Sadie starred as Annie in the most recent Broadway revival of Annie. She alternated the role with another actress from July 2013 until the production closed in 2014.

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Sadie in 2013. Look at that adorable grin!

4. She also starred as young Queen Elizabeth II in the Broadway play The Audience. The play, starring Helen Mirren as adult Queen Elizabeth II, centered around the queen's meetings, called audiences, with her prime ministers.

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Sadie is on the left, with Helen Mirren and Elizabeth Teeter.

4a. She went to the Tonys with Helen Mirren in 2015 and they danced together on the red carpet. Mirren won Best Actress in a Play for The Audience that year.

5. Sadie has a younger sister named Jacey who also has red hair and a knack for taking extremely cute Instagram photos.

6. She's real-life BFFs with Millie Bobby Brown, who plays Eleven on Stranger Things. This past summer, they went on vacation together in Mexico with their families.

7. In season two of Stranger Things, Sadie will play Max, the stepsister of new character Billy (played by Dacre Montgomery). Sadie told WWD that Max is "a rough and tumble skater girl [who] becomes friends with the boys at school. And that’s basically all I can say." Finn Wolfhard, who plays Mike, adds that Max might cause some drama between the guys this season. "Dustin and Lucas end up kind of falling in love with her," he told People. "And she sort of gets into the group, and I’m not really happy with it because I’m kind of envious because they’re in love and I’m not."

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