There was a Stranger Things reunion on Saturday Night Live! Just not a complete one... Finn Wolfhard was the guest host for Saturday's SNL episode, and he brought out a huge treat for fans when his buddies and Stranger Things co-stars Caleb McLaughlin and Gaten Matarazzo took to the stage with him during his monologue! The three boys joked about now being "former child stars" and growing up in the spotlight.