Jessica Chastain Beverly Marsh James McAvoy Bill Denbrough Bill Hader Richie Tozier Isaiah Mustafa Mike Hanlon Jay Ryan Ben Hanscom James Ransone Eddie Kaspbrak Andy Bean Stanley Uris Bill Skarsgård Pennywise Jaeden Martell Young Bill Denbrough Wyatt Oleff Young Stanley Uris Jack Dylan Grazer Young Eddie Kaspbrak Finn Wolfhard Young Richie Tozier Sophia Lillis Young Beverly Marsh Chosen Jacobs Young Mike Hanlon Jeremy Ray Taylor Young Ben Hanscom Teach Grant Henry Bowers Nicholas Hamilton Young Henry Bowers Javier Botet Hobo / The Witch Xavier Dolan Adrian Mellon Taylor Frey Don Hagarty Molly Atkinson Myra / Sonia Kaspbrak Joan Gregson Mrs. Kersh Stephen Bogaert Alvin Marsh Luke Roessler Dean Stephen King Shopkeeper Peter Bogdanovich Peter Will Beinbrink Tom Jess Weixler Audra Phillips Martha Girvin Patty Ryan Kiera Armstrong Victoria Fuller Jackson Robert Scott Dead Georgie Jake Weary Webby Katie Lunman Chris Unwin Kelly Van der Burg Victoria's Mom Jason Fuchs Richie's Manager Joe Bostick Mr. Keene Megan Charpentier Young Gretta Juno Rinaldi Gretta Neil Crone Chief Borton Ry Prior Connor Owen Teague Dead Hocksstetter Jake Sim Belch Huggins Logan Thompson Victor Criss Connor Smith Carny Amanda Zhou Waitress Rob Ramsay Meaner Nurse John Connon John Koontz (Juniper Hill Security) Doug MacLeod Head Honcho Brandon Crane Big Guy Erik Junnola Scuzzah Josh Madryga Scuzzah Kiley May Shokopiwah Woman Lisa Cromarty Shokopiwah Woman Kevin Allan Hess Shokopiwah Man Stephen R. Hart Shokopiwah Man Billy Merasty Shokopiwah Man Sladen Peltier Shokopiwah Young Boy Ari Cohen Stanley's Dad Alex Bird Theatre P.A. Brody Bover Shouting Kid Edie Inksetter Shouting Kid's Mom Martin Julien Janitor Sonia Maria Chirila Fishtank Girl Declan Prior Bully Marko Vujicic Bully Eric Woolfe Nurse Kate Corbett Dean's Mom Janet Porter Richie's Mom Anthony Ulc The Butcher