In real life, Millie Bobby Brown, who plays Eleven, is 18 years old in 2022. Finn Wolfhard, who plays Mike, is 19, making him four years older than the character he plays.

Gaten Matarazzo, who plays Dustin, is also 19 in real life. The actor who plays Will, Noah Schnapp, is only 17, so he's close enough to his character's on-screen age.

On the other hand, Caleb McLaughlin, who plays Lucas, is 20 years old in real life. And Sadie Sink (aka Max) is also 20. Natalia Dyer, who plays Nancy in Stranger Things, is actually 27 in real life, while Charlie Heaton (Jonathan) is 28. Maya Hawke, who plays Robin, is 23.

Fan-favorite Joe Keery (our beloved Steve) is 30 years old. Clearly, though, he can get away with playing a much younger character.