Last year's adaptation of Stephen King's IT became one of the biggest successes of the year. The movie went on to earn more than 700 million dollars worldwide. The follow-up film will be supposedly landing in theaters in September of 2019. OmegaUnderground reported that the horror sequel will begin shooting this summer. One of the biggest questions about the upcoming movie, is which actors will portray the adult versions of these characters. No official casting announcements have been made.