Caleb McLaughlin, Charlie Heaton, Christian Lee Hutson, EG, Ethan Hawke, Finn Wolfhard, Gaten Matarazzo, Iris Apatow, Joe Keery, Kathryn Newton, Levon Roan Thurman-Hawke, Maya Hawke, Natalia Dyer, Sadie Sink, Sam Nivola, Uma Thurman seen at St. George's Episcopal Church