Ansel Elgort

Character: Theodore Decker

Oakes Fegley

Character: Young Theodore Decker

Nicole Kidman

Character: Samantha Barbour

Jeffrey Wright

Character: James 'Hobie' Hobart

Luke Wilson

Character: Larry Decker

Sarah Paulson

Character: Xandra

Willa Fitzgerald

Character: Kitsey Barbour

Aneurin Barnard

Character: Boris Pavlikovsky

Finn Wolfhard

Character: Young Boris Pavlikovsky

Ashleigh Cummings

Character: Pippa

Aimee Laurence

Character: Young Pippa

Robert Joy

Character: Welton 'Welty' Blackwell

Boyd Gaines

Character: Mr. Barbour

Carly Connors

Character: Young Kitsey Barbour

Luke Kleintank

Character: Platt Barbour

Hailey Wist

Character: Theo's Mother

Ryan Foust

Character: Andrew 'Andy' Barbour

Jack DiFalco

Character: Young Platt Barbour

Austin Weyant

Character: Adult Toddy Barbour

Collin Shea Schirrmacher

Character: Young Toddy Barbour

Nicky Torchia

Character: Young Tom Cable

Denis O'Hare

Character: Lucius Reeve

Peter Jacobson

Character: Mr. Silver

Joey Slotnick

Character: Dave

Gordon Winarick

Character: Adult Tom Cable

Caroline Day

Character: Em

Pamela Dunlap

Character: Mrs. Vogel

Misha Osherovich

Character: Shirley T

Aidan Kennedy

Character: Middle School Student

Alton Fitzgerald White

Character: Social Worker

Kevin D. McGee

Character: Doorman

Hannah Kurczeski

Character: Middle School Student

Matteo van der Grijn

Character: Gyuri

Kevin Owen McDonald

Character: Mr. Pavlikovsky

Nick Vorsselman

Character: Boy on Street at Airport

Hank Rogerson

Character: Vegas Teacher

Robert Turano

Character: Detective #2

Don Castro

Character: Detective #1

Rick Bolander

Character: Paramedic

Vincent Tumeo

Character: Bar Patron - Restaurant

Ben Hollandsworth

Character: Race

Gerson Oratmangoen

Character: Indonesian Man

Angela Covello

Character: Female Social Worker

Dylan Boyd

Character: Student

James Donahower

Character: Mr. Beeman

Alma Cuervo

Character: Store Owner