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