Warning: Mild spoilers ahead, so if you want to know absolutely NOTHING, bookmark this for later! 1. Beverly Marsh — played by Sophia Lillis and Jessica Chastain: Warner Bros. Fun fact: Lillis said she "always wanted" Jessica Chastain to play her since day one of shooting It (Chapter One). 2. Bill Denbrough — played by Jaeden Lieberher and James McAvoy: Warner Bros. Fun fact: Lieberher said he was flattered that they cast McAvoy as "old" Bill because "he's a very handsome dude." 3. Richie Tozier — played by Finn Wolfhard and Bill Hader: Warner Bros. Fun fact: Bill Hader joked that Finn Wolfhard is like Joffrey from Game of Thrones because he was "powerful" enough to help Hader get cast as older Richie. 4. Eddie Kaspbrak — played by Jack Dylan Grazer and James Ransone: Warner Bros. Fun fact: Grazer and Ransone's first meeting was kind of awkward, and they just talked about music. 5. Ben Hanscom — played by Jeremy Ray Taylor and Jay Ryan: Warner Bros. Fun fact: Taylor joked that he would "not mind looking like Jay Ryan" when he's 40, but he did say it was surreal meeting him. 6. Mike Hanlon — played by Chosen Jacobs and Isaiah Mustafa: Warner Bros. Fun fact: Mustafa tried to hold his arm the way Jacobs did in the first movie to channel Mike more, but Muschietti told him not to, LOL. 7. Stanley Uris — played by Wyatt Oleff and Andy Bean: Warner Bros. Fun fact: Oleff gave advice to Bean sometimes and was able to answer questions about the character if he needed it. 8. Henry Bowers — played by Nicholas Hamilton and Teach Grant: Warner Bros. Fun fact: Hamilton praised Teach's performance and said he took his Henry and "upped him by 1,000." 9. Gretta Keene — played by Megan Charpentier and Juno Rinaldi: Warner Bros., George Pimentel / Getty Fun fact: OK, this isn't a fun fact, but I used an IRL photo of Juno here because there are no publicly released images of "old" Gretta yet, but you get the idea!