Kiana Madeira

Deena

Olivia Scott Welch

Samantha Fraser

Benjamin Flores Jr.

Josh

Julia Rehwald

Kate

Fred Hechinger

Simon

Maya Hawke

Heather

Charlene Amoia

Rachel Thompson / Sunnyvale Customer

David Thompson

Ryan Torres

Noah Bain Garret

Skull Mask

Darrell Britt-Gibson

Martin

Ashley Zukerman

Nick Goode

Jana Allen

TV Reporter #1

Matt Burke

Football Coach

Christian Bridges

Fun Shadyside Football Player

Matthew Zuk

Mayor Will Goode

Jeremy Ford

Peter

Jaime Matthis

Shadyside Player

Danyon Huntington

Sunnyvale Skullmask

Elizabeth Scopel

Sarah Fier

Tayla Rogers

The Babysitting Twin

Maya Rogers

The Babysitting Twin

Jordana Spiro

Mrs. Lane

Diane Sellers

Check In Nurse

Eric Mendenhall

Nurse Beddy

Todd Allen Durkin

Officer Kapinsky

Jordyn DiNatale

Ruby Lane

Lloyd Pitts

Nightwing Killer

Kevin Waterman

'The Milkman' Harry Rooker

Emily Brobst

Billy Barker

Keil Oakley Zepernick

'Shame Killer' Isaac Milton

Michael Chandler

'The Pastor' Cyrus Miller

Lacy Camp

Mrs. Fraser

Meghan Packer

TV Reporter #2

Gillian Jacobs

C. Berman (voice)

Sadie Sink

Ziggy Berman (uncredited)