Michael Angarano

as Mark

as Sam Amirante

as Rickey

as Richie Diane

as Walter Childs

as Walter Childs

as Robert Serber

as Danny

as Glenn

as Tinder Date

as Steve

as Max

as Owen

as Elliot

as Ned Chipley

as Eddie Zeidel

as Young Adult Nicky Pearson

as Christopher Archer

as Travis (voice)

as Cyrus Kinnick

as Dr. Bertram “Bertie" Chickering, Jr.

as Cooper

as Eddie

as Jason Sherwood

as Michael Angarano

as John

as Jake

as Scott

as Travis

as Dustin

as Sam Davis

as Benjamin

as Jason Tripitikas

as Cole McKay

as Mitch Akers

as Arthur Parkinson

as Cameron Kincaid

as Charlie

as Self

as Dylan Jameison

as Will Stronghold

as Sid

as Freddie

as Rocky Mazzelli

as Ethan Claypool

as Jeb Ekhart

as Dave Petrakis

as Young Red Pollard

as Maniac Magee

as George Denton

as Philip

as Scott Wallace

as Matt Tyler

as Young William

as Chance Arno

as Nick at 7

as Nick

as Bicycle Kid

as Young Tom

as Elliot

as Sammy Yoder

as Drew

as 3-Yr-old Cowboy

as Patrick Harper

as Timmy

as Zack

as David Duchovny's Son (uncredited)

as Steven Michael Frame

as Bicycle Kid