On October 9, 2015, "TheWrap" reported a film based on the series was being developed by 20th Century Fox and Chernin Entertainment. On February 13, 2017, The Tracking Board reported that Kyle Killen will write the script for the film. On July 13, 2017, "Variety" reported that Leigh Janiak will direct the film and will oversee the development of the scripts as a trilogy. On February 27, 2019, it was announced that Kiana Madeira and Olivia Welch will star as the lead characters in the trilogy. On March 12, 2019, "Deadline Hollywood" reported that Benjamin Flores, Jr. will star as Josh. Ashley Zukerman, Fred Hechinger, Julia Rehwald and Jeremy Ford joined the cast on March 27. On April 1, 2019, Gillian Jacobs joined the cast of the first film, while Sadie Sink, Emily Rudd and McCabe Slye were cast in the second film.