Bill Skarsgård

Pennywise

James McAvoy

Bill Denbrough

Jessica Chastain

Beverly Marsh

Bill Hader

Richie Tozier

Isaiah Mustafa

Mike Hanlon

Jay Ryan

Ben Hanscom

James Ransone

Eddie Kaspbrak

Andy Bean

Stanley Uris

Teach Grant

Henry Bowers

Jaeden Martell

Young Bill Denbrough

Sophia Lillis

Young Beverly Marsh

Finn Wolfhard

Young Richie Tozier

Chosen Jacobs

Young Mike Hanlon

Wyatt Oleff

Young Stanley Uris

Jeremy Ray Taylor

Young Ben Hanscom

Jack Dylan Grazer

Young Eddie Kaspbrak

Nicholas Hamilton

Young Henry Bowers

Molly Atkinson

Myra / Sonia Kaspbrak

Luke Roessler

Dean

Joan Gregson

Mrs. Kersh

Jackson Robert Scott

Dead Georgie

Javier Botet

Hobo / The Witch

Xavier Dolan

Adrian Mellon

Taylor Frey

Don Hagarty

Stephen Bogaert

Alvin Marsh

Stephen King

Shopkeeper

Peter Bogdanovich

Peter

Will Beinbrink

Tom

Jess Weixler

Audra Phillips

Martha Girvin

Patty

Ryan Kiera Armstrong

Victoria Fuller

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 Hockstetter

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

Peter George Commanda

Shokopiwah Shaman

Kiley May

Shokopiwah Woman

Lisa Cromarty

Shokopiwah Woman

Kevin Allan Hess

Shokopiwah Man

Stephen R. Hart

Shokopiwah Man

Rocky L. Burnham Jr.

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

Colin Mcleod

Bully

Declan Prior

Bully

Marko Vujicic

Bully

Eric Woolfe

Nurse

Kate Corbett

Dean's Mom

Shawn Storer

Dean's Dad

Janet Porter

Richie's Mom

Scott Edgecombe

Customer

Anthony Ulc

The Butcher

J. Bogdan

Swearing Patient

Louise Stratten

Audra's Assistant

Laura Thorne

Production Assistant

Thomas Duhig

Assistant Director

Carla Guerrier

Police Officer

Liam MacDonald

Dean's Friend

Chris D'Silva

Dean's Friend

Tristan Levi Cox

4-Year-Old Young Mike

Torian Matthew Cox

4-Year-Old Young Mike

Lola Del Re Hudson

Betty Ripsom's Legs

Thiago Dos Santos

Twitchy Man

Divan Meyer

Audience Member (uncredited)

Andy Muschietti

Pharmacy Customer (uncredited)