 
                                                                96 minutos
Following a childhood tragedy, Dewey Cox follows a long and winding road to music stardom. Dewey perseveres through changing musical styles, an addiction to nearly every drug known and bouts of uncontrollable rage.
 
                                                        John C. Reilly
Dewey Cox
 
                                                        Jenna Fischer
Darlene Madison
 
                                                        Raymond J. Barry
Pa Cox
 
                                                        Kristen Wiig
Edith
 
                                                        Tim Meadows
Sam
 
                                                        Harold Ramis
L'Chaim
 
                                                        Margo Martindale
Ma Cox
 
                                                        Chris Parnell
Theo
 
                                                        Matt Besser
Dave
 
                                                        Nat Faxon
Awards Show Stage Manager
 
                                                        Conner Rayburn
Dewey Age 8
 
                                                        Chip Hormess
Nate
 
                                                        Terrence Beasor
Country Doctor
 
                                                        Honeyboy Edwards
Old Bluesman
 
                                                        Gerry Black
Harmonica Player
 
                                                        Aron Johnson
Teenage Band
 
                                                        Jack Donovan Saperstein
Teenage Band
 
                                                        Taylor Hubert
Teenage Band
 
                                                        Christopher Hurt
Teenage Band
 
                                                        Matt Price
MC (Teacher)
 
                                                        John Maynard
Man at Talent Show
 
                                                        E.J. Callahan
Second Man at Talent Show
 
                                                        Rance Howard
Preacher
 
                                                        Craig Robinson
Bobby Shad
 
                                                        Paul Bates
Nightclub Manager
 
                                                        Patrick Faucette
Bad Men Bass Player
 
                                                        Phil Rosenthal
Mazeltov
 
                                                        Martin Starr
Schmendrick
 
                                                        Oscar Dillon
Audience Guy at Nightclub
 
                                                        Jack McBrayer
DJ
 
                                                        Molly C. Quinn
Teen with Pinups
 
                                                        John Ennis
The Big Bopper
 
                                                        Frankie Muniz
Buddy Holly
 
                                                        Ed Helms
Stage Manager
 
                                                        Jack White
Elvis Presley
 
                                                        Angela Little
Beth Anne
 
                                                        Odette Annable
Reefer Girl
 
                                                        Tyler Nilson
Bert
 
                                                        Deanna Brooks
Hotel Groupie with Dewey
 
                                                        Ian Roberts
Drug Dealer
 
                                                        Steve Bannos
Prison Guard
 
                                                        Willow Geer
Rehab Nurse
 
                                                        David Doty
Rehab Doctor
 
                                                        Jack Kehler
Press Conference Reporter
 
                                                        Gerry Bednob
The Maharishi
 
                                                        David Krumholtz
Schwartzberg
 
                                                        Tim Bagley
Engineer
 
                                                        Jane Lynch
Gail the Television Reporter
 
                                                        Skyler Gisondo
Dewdrop
 
                                                        Kshitij Pendurkar
Dewey Rahim
 
                                                        Simon Helberg
Dreidel L'Chaim
 
                                                        Jacques Slade
Lil' Nutzzak
 
                                                        Danica Rozelle
Music Video Girl
 
                                                        Lurie Poston
Cox Kid
 
                                                        Maggie Mannion
Cox Kid
 
                                                        Jackson Browne
Jackson Browne
 
                                                        Jewel
Jewel
 
                                                        Lyle Lovett
Lyle Lovett
 
                                                        Stacey Scowley
Pierced Eyebrow Girl
 
                                                        Ajla Hodžić
Pierced Lip Girl
 
                                                        Ghostface Killah
Ghostface Killah
 
                                                        Otis Williams
The Temptations
 
                                                        Ron Tyson
The Temptations
 
                                                        Terry Weeks
The Temptations
 
                                                        Joe Herndon
The Temptations
 
                                                        Bruce Williamson
The Temptations
 
                                                        Eddie Vedder
Eddie Vedder
 
                                                        Jack Black
Paul McCartney (uncredited)
 
                                                        Paul Rudd
John Lennon (uncredited)
 
                                                        Justin Long
George Harrison (uncredited)
 
                                                        Jason Schwartzman
Ringo Starr (uncredited)
 
                                                        Patrick J. Adams
The Kid (uncredited)
 
                                                        Clement Blake
Edith's Father (uncredited)
 
                                                        Patrick Duffy
Patrick Duffy (uncredited)
 
                                                        Morgan Fairchild
Morgan Fairchild (uncredited)
 
                                                        Paul Feig
Different DJ (uncredited)
 
                                                        Amber Hay
LSD Vision (uncredited)
 
                                                        John Michael Higgins
Record Producer (uncredited)
 
                                                        Jonah Hill
Older Nate (uncredited)
 
                                                        Neil Ironfield
Dewey's Child (uncredited)
 
                                                        Cheryl Ladd
Cheryl Ladd (uncredited)
 
                                                        Cheryl Tiegs
Cheryl Tiegs (uncredited)
 
                                                        Serria Tawan
70's African American Woman (uncredited)
 
                                                        Adam Herschman
Jerry Garcia (uncredited)
 
                                                        John D. Crawford
Officer Clark