Vanessa Marano

Molly

David Henrie

Sebastian

Gregg Sulkin

Kale

Jeff Garlin

Mr. Elmer

Bug Hall

Donnie

Jake Short

Mikey

Alyssa Jirrels

Zoey

Lorenzo James Henrie

Josh

Kate Katzman

Sofia

Chris Mullinax

Officer Greg

Billy Culbertson

Concert Security Guard

Sammy Voit

Dr. Spacecakes

Montserrat Espadalé

Mrs. Shockley

Gregg Christie

Luca

Boston Pierce

Young Josh

Josh Rhett Noble

Homeless Jared

Emily Towles

Bohemian Girl

Josh Dunn

Teen Nerd

Savanna Renee

Emo Senior Student

Yvette Gregory

Danica

Bruce Cooper

Concert Fan

Dianna M. Cruz

Liz

Frankie Manes

Carnie

Mark Baggs

Carnival Worker

Kenneth Lee Tolbert

Yokel #1

Kirby Elizabeth Self

Amberly

Adam Woldtvedt

Yokel #2

Kodai Yamaguchi

Party Goer

Morgan Tooles

Colby Shabel

Jock Anchor

Trey Shabel

Leo

Jeremy Howard

Party Patron, Carnival Patron (uncredited)