Kiana Madeira

Character: Deena

Olivia Scott Welch

Character: Samantha Fraser

Benjamin Flores Jr.

Character: Josh

Julia Rehwald

Character: Kate

Fred Hechinger

Character: Simon

Maya Hawke

Character: Heather

Charlene Amoia

Character: Rachel Thompson / Sunnyvale Customer

David Thompson

Character: Ryan Torres

Noah Bain Garret

Character: Skull Mask

Darrell Britt-Gibson

Character: Martin

Ashley Zukerman

Character: Nick Goode

Jana Allen

Character: TV Reporter #1

Matt Burke

Character: Football Coach

Christian Bridges

Character: Fun Shadyside Football Player

Matthew Zuk

Character: Mayor Will Goode

Jeremy Ford

Character: Peter

Jaime Matthis

Character: Shadyside Player

Danyon Huntington

Character: Sunnyvale Skullmask

Elizabeth Scopel

Character: Sarah Fier

Tayla Rogers

Character: The Babysitting Twin

Maya Rogers

Character: The Babysitting Twin

Jordana Spiro

Character: Mrs. Lane

Diane Sellers

Character: Check In Nurse

Eric Mendenhall

Character: Nurse Beddy

Todd Allen Durkin

Character: Officer Kapinsky

Jordyn DiNatale

Character: Ruby Lane

Lloyd Pitts

Character: Nightwing Killer

Kevin Waterman

Character: 'The Milkman' Harry Rooker

Emily Brobst

Character: Billy Barker

Keil Oakley Zepernick

Character: 'Shame Killer' Isaac Milton

Michael Chandler

Character: 'The Pastor' Cyrus Miller

Lacy Camp

Character: Mrs. Fraser

Meghan Packer

Character: TV Reporter #2

Gillian Jacobs

Character: C. Berman (voice)

Sadie Sink

Character: Ziggy Berman (uncredited)