Andy Muschietti Director Jessica Chastain Beverly Marsh Actor James McAvoy Bill Denbrough Actor Bill Hader Richie Tozier Actor Isaiah Mustafa Mike Hanlon Actor Jay Ryan Ben Hanscom Actor James Ransone Eddie Kaspbrak Actor Andy Bean Stanley Uris Actor Bill Skarsgård Pennywise Actor Jaeden Martell Young Bill Denbrough Actor Wyatt Oleff Young Stanley Uris Actor Jack Dylan Grazer Young Eddie Kaspbrak Actor Finn Wolfhard Young Richie Tozier Actor Sophia Lillis Young Beverly Marsh Actor Chosen Jacobs Young Mike Hanlon Actor Jeremy Ray Taylor Young Ben Hanscom Actor Teach Grant Henry Bowers Actor Nicholas Hamilton Young Henry Bowers Actor Javier Botet Hobo, The Witch Actor Xavier Dolan Adrian Mellon Actor Taylor Frey Don Hagarty Actor Molly Atkinson Myra, Sonia Kaspbrak Actor Joan Gregson Mrs. Kersh Actor Stephen Bogaert Alvin Marsh Actor Luke Roessler Dean Actor Stephen King Shopkeeper Actor Peter Bogdanovich Peter -- Director Actor Will Beinbrink Tom Actor Jess Weixler Audra Phillips Actor Gary Dauberman Screenwriter, Executive Producer Richard Brener Executive Producer Dave Neustadter Executive Producer Marty P. Ewing Executive Producer Seth Grahame-Smith Executive Producer David Katzenberg Executive Producer Dan Lin Producer Roy Lee Producer Barbara Muschietti Producer Checco Varese Cinematographer Jason Ballantine Film Editing Benjamin Wallfisch Original Music Paul Denham Austerberry Production Design Luis Sequeira Costume Design Rich Delia Casting