Stranger Things cast today, the kids we knew and loved in 2016 are so grown up it's crazy.WATCH: Stranger Things season four trailerThe iconic Netflix show just released the first half of its fourth season and fans are losing their minds over how much the series' child stars have matured.From Millie Bobby Brown, who has turned into a young woman before our very eyes, to Finn Wolfhard, who just keeps getting taller, the young cast have gone through some major transformations.READ NEXT: Here's everything we know about Bridgerton's third seasonAnd if you thought it was obvious on the show, just wait until you compare these photos of the cast on their first red carpet and the most recent 2022 show premieres.The kids are all grown up and we feel positively ancient.