Finn Wolfhard Young Richie Tozier
Bill Skarsgård Pennywise
James McAvoy Bill Denbrough
Jessica Chastain Beverly Marsh
Sophia Lillis Young Beverly Marsh
Stephen King Shopkeeper, Novel
Jaeden Martell Young Bill Denbrough
Jack Dylan Grazer Young Eddie Kaspbrak
Bill Hader Richie Tozier
James Ransone Eddie Kaspbrak
Xavier Dolan Adrian Mellon
Peter Bogdanovich Peter - Director
Owen Teague Dead Hockstetter
Andy Muschietti Director, Pharmacy Customer (uncredited)
Jake Weary Webby
Wyatt Oleff Young Stanley Uris
Jeremy Ray Taylor Young Ben Hanscom
Isaiah Mustafa Mike Hanlon
Chosen Jacobs Young Mike Hanlon
Ryan Kiera Armstrong Victoria Fuller
Javier Botet Hobo / The Witch
Brandon Crane Big Guy
Joe Bostick Mr. Keene
Jay Ryan Ben Hanscom
Megan Charpentier Young Gretta
Jess Weixler Audra Phillips
Luke Roessler Dean
Gary Dauberman Screenplay, Executive Producer
Jackson Robert Scott Dead Georgie
Shane Vieau Set Decoration
Jason Fuchs Richie's Manager, Co-Producer, Screenplay
Nicholas Hamilton Young Henry Bowers
Barbara Muschietti Producer
Seth Grahame-Smith Executive Producer
Stephen R. Hart Shokopiwah Man
Alec Gillis Makeup Designer
Andy Bean Stanley Uris
Roy Lee Producer
Ari Cohen Stanley's Dad
Stephen Bogaert Alvin Marsh
Anthony Ulc The Butcher
Neil Crone Chief Borton
Teach Grant Henry Bowers
Rich Delia Casting
Billy Merasty Shokopiwah Man
Geoff Scovell Stunts
Tom Woodruff Jr. Makeup Designer
Will Beinbrink Tom
Kate Corbett Dean's Mom
Luis Sequeira Costume Design
Jason Gosbee Stunts
Benjamin Wallfisch Original Music Composer
Roberto Campanella Choreographer
Amanda Zhou Waitress
Jessie Pariseau Sound Effects Editor
Juno Rinaldi Gretta
Janet Porter Richie's Mom
Catherine Harper Foley Artist
Nancy Nugent Title Supervising Sound Editor
Louise Stratten Audra's Assistant
Joan Gregson Mrs. Kersh
Michelle Pazer ADR Editor, Dialogue Editor
James Binkley Stunts
Edie Inksetter Shouting Kid's Mom
Molly Atkinson Myra / Sonia Kaspbrak
Matt Birman Stunts
Jamie Jones Stunt Coordinator
Dan Lin Producer
Randy K. Singer Foley Mixer
Derek Barnes Stunts
Martha Girvin Patty
Vanzie Meyer Audience Member (uncredited)