James McAvoy Bill Denbrough
Jack Dylan Grazer Young Eddie Kaspbrak
Jessica Chastain Beverly Marsh
Kiley May Shokopiwah Woman
Finn Wolfhard Young Richie Tozier
Xavier Dolan Adrian Mellon
Bill Skarsgård Pennywise
Megan Charpentier Young Gretta
Jaeden Martell Young Bill Denbrough
Sophia Lillis Young Beverly Marsh
Kris Fenske Sound Effects Editor
James Ransone Eddie Kaspbrak
Isaiah Mustafa Mike Hanlon
Wyatt Oleff Young Stanley Uris
Luke Roessler Dean
Bill Hader Richie Tozier
Javier Botet Hobo / The Witch
Ryan Kiera Armstrong Victoria Fuller
Edward A. Queffelec Stunts
Stephen King Shopkeeper, Novel
Owen Teague Dead Hockstetter
Thomas J. O'Connell ADR Mixer
Christopher Geggie Property Master
Andy Muschietti Pharmacy Customer (uncredited), Director
Stephen R. Hart Shokopiwah Man
Doug MacLeod Head Honcho
John Mackenzie Construction Coordinator
Coco Kleppinger Casting Associate
Carol Hartwick Key Hair Stylist
Stephen Nakamura Digital Intermediate Colorist
Sondra Treilhard Key Hair Stylist
Stephen Bogaert Alvin Marsh
Peter Bogdanovich Peter
Jeremy Gillespie Graphic Designer
Jackson Robert Scott Dead Georgie
Rich Delia Casting
Teach Grant Henry Bowers
Juno Rinaldi Gretta
Janet Porter Richie's Mom
Gary Dauberman Screenplay, Executive Producer
Jess Weixler Audra Phillips
Jake Weary Webby
Ari Cohen Stanley's Dad
Roy Lee Producer
Nancy Nugent Title Supervising Sound Editor
Joan Gregson Mrs. Kersh
Jeremy Ray Taylor Young Ben Hanscom
Rob Ramsay Meaner Nurse
Sonia Maria Chirila Fishtank Girl
Dave Neustadter Executive Producer
Will Beinbrink Tom
Matt Birman Stunts
Chosen Jacobs Young Mike Hanlon
Benjamin Wallfisch Original Music Composer
Billy Merasty Shokopiwah Man
Jay Ryan Ben Hanscom
Thiago Dos Santos Twitchy Man
Eric Woolfe Nurse
Alec Gillis Makeup Designer
Warren Appleby In Memory Of, Special Effects Coordinator
Joe Bostick Mr. Keene
Jason Fuchs Richie's Manager, Co-Producer
Andy Bean Stanley Uris
Jake Sim Belch Huggins
Brandon Crane Big Guy
Darin Read Associate Producer
Nicholas Hamilton Young Henry Bowers
Wayne Wells Stunts
Tom Farr Stunts
Roberto Campanella Choreographer
William Waring Second Unit Director
Seth Grahame-Smith Executive Producer