Jack Black
Dewey Finn
Joan Cusack
Rosalie Mullins
Mike White
Ned Schneebly
Sarah Silverman
Patty Di Marco
Miranda Cosgrove
Summer Hathaway
Joey Gaydos Jr.
Zack
Kevin Alexander Clark
Freddy Jones
Rivkah Reyes
Katie
Robert Tsai
Lawrence
Maryam Hassan
Tomika
Aleisha Allen
Alicia
Caitlin Hale
Marta
Brian Falduto
Billy
Z Infante
Gordon
James Hosey
Marco
Angelo Massagli
Frankie
Cole Hawkins
Leonard
Lee Wilkof
Mr. Green
Kate McGregor-Stewart
Mrs. Lemmons
Adam Pascal
Theo
Lucas Babin
Spider
Lucas Papaelias
Neil
Chris Stack
Doug
Suzzanne Douglas
Tomika's Mother
Jordan-Claire Green
Michelle
Eron Otcasek
Musician
Carlos Velazquez
Musician
Wally Dunn
Gym Teacher
Tim Hopper
Zack's Father
Nicky Katt
Razor
Heather Goldenhersh
Sheila
Timothy "Speed" Levitch
Waiter
Sharon Washington
Alicia's Mother
Kim Brockington
Leonard's Mother
Kathleen McNenny
Freddy's Mother
Joanna Adler
Summer's Mother
Robert Lin
Lawrence's Father
Barry Shurchin
Cop
MacIntyre Dixon
Bus Driver
Amy Sedaris
Mrs. Haynish
Elle Key
Concert Goer
Frank Whaley
Battle of the Bands Director (uncredited)
Lauren Adler
Concert Goer (uncredited)
Kelly Anne Burns
Groupie (uncredited)
Leanne Cabrera
Concert Goer (uncredited)
Catherine A. Callahan
Concert Goer (uncredited)
Cedric Cannon
Leonard's Dad (uncredited)
Anivile Daniel
Concert Goer (uncredited)
Jane DeNoble
Billy's Mom (uncredited)
Caileigh Scott
Concert Goer (uncredited)
Karen Nazarov
Groupie (uncredited)
Riley G. Matthews, Jr.
Blood Brothers MC Biker (uncredited)
Ryan O'Connor
No Vaccancy's Biggest Fan (uncredited)
Jamie Vergan
Concert Goer (uncredited)
Veronica Afflerbach
Eleni
Jaclyn Neidenthal
Emily
Kimberly Grigsby
Mrs. Sheinkopf
Michael Dominguez-Rudolph
Art Student
Crash Cortez
Max
John Highsmith
Tony
Scott Graham
Punk Rock Guy
Marty Murphy
Concerned Father
Mary Fortune
Teacher's Assistant
Mandy Siegfried
Female Employee
Carlos J. Da Silva
Security Guard
Ian O'Malley
Radio Exec
Chris Line
Radio DJ
Kyle Meaney
Toby
Scott Ross
Concert Goer (uncredited)
Johnny Sullivan
Guy in Crowd Who Catches Dewey (uncredited)
Joe Wachowski
Concert Goer (uncredited)
