Celebrity Celebrity Relationships Celebrity Friendships Sadie Sink Opens Up About Close Friendship with Millie Bobby Brown: We'd Be 'Lost Without Each Other' Sink, who plays Max Mayfield on Stranger Things, spoke about being close with her teenage costars By Kelly Wynne Kelly Wynne Kelly Wynne has been a TV writer at PEOPLE digital since 2021. Her work has been seen in Newsweek, where she acted as a reality TV and true-crime writer, Atwood Magazine and her mental health blog, The Chronically. People Editorial Guidelines Published on November 3, 2022 12:39PM EDT Photo: Chris Polk/KCA2018/Getty Sadie Sink and Millie Bobby Brown's friendship extends far beyond the Stranger Things set. Sink, 20, revealed she, Brown and their Stranger Things costars are very close friends in real life — so much so that they've played critical roles in helping each other navigate growing up in the spotlight. Sadie Sink Feels 'More Comfortable' with Herself at 20 — But Not 'Quite Like an Adult Yet' "Having each and every kid on the show — I think we'd be so lost without each other," Sink told Access. "We really depend on each other when things get absolutely nuts, or when you need to talk to someone who understands exactly what you're going through. We have each other." She continued, "Especially having Millie — she was the only girl at first. So, I think, it was nice that we had that connection." Millie Bobby Brown and Sadie Sink. Charley Gallay/Getty The All Too Well (10 Minute Version) short film actress praised her cast mates for their support, calling their connection "really unique and something I'm so grateful for." Sadie Sink 'Begged' to Play Stranger Things' Max When Casting Team Thought She Was Too 'Old' at 14 Season 4 of Stranger Things aired two parts this past summer — and the fate of Sink's character, Max Mayfield, remains to be seen. Season 4 ended with Max's near-death battle with the show's leading villain, Vecna (Jamie Campbell Bower). Though Max nearly met the same, brutal fate of many of the Hawkins teens, she was saved by Brown's Eleven. However, the series ended with Max in a coma after she fell from Vecna's grasp with many broken bones and an inability to see. Theo Wargo/Getty Never miss a story — sign up for PEOPLE's free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories. Stranger Things has been renewed for a fifth and final season, which has no release date yet. Seasons 1–4 are streaming on Netflix now.