Matthew Lillard
as
Mooney
Jim Piddock
as
Mr. Newell
James Remar
as
Sam Kramer
Penelope Spheeris
Director
Marlon Wayans
as
Darryl Witherspoon
Richard McGonagle
as
Robert Bellweather
Matthew Lillard
as
Tim LaFlour
Mark Christopher Lawrence
as
Wig Shop Owner
Matthew Lillard
as
Jack
Valeria Golino
as
Jamie
Dennis Keiffer
as
Lenny
Vincent D'Onofrio
as
Max
Dean Norris
as
Bill Dellinger
Billy Burke
as
Kenny Moore
Matthew Lillard
as
Roscoe Devine
Jeff Probst
Director
Matthew Lillard
as
Fishman
Louis Chirillo
as
Male Cop
Frances Bay
as
Mrs. Darmsetter
Ryan Reynolds
as
Quigley
Ray Liotta
as
Abominable Dad
Nolan Gould
as
Adam / Sweet Kid
Matthew Lillard
as
Dog Catcher / Al / Passerby
Jane Lynch
as
Margaret Knowhow
Robert Ben Garant
as
Campus Cop
Cheryl Hines
as
Professor Adams
Olivia Wilde
as
Sarah Witt
Matthew Lillard
as
Spaceman
Rob Yang
as
Jim
Carla Gugino
as
Lisa Davis
Matthew Lillard
as
Mike Davis
Patrick Stewart
as
Tobi Powell
Matthew Lillard
as
Bernie Wexler
Katie Cassidy
as
Dawn Walsh
Missi Pyle
as
Liz
Debby Ryan
as
Nicole
Kofi Sarkodie-Mensah
as
Kofi Kingston
Frank Welker
as
Scooby-Doo / Fred Jones
Matthew Lillard
as
Shaggy Rogers
Matthew Lillard
as
Norville 'Shaggy' Rogers
Frank Welker
as
Scooby Doo / Fred Jones / Jabberjaw / Great Gazoo / Self
Seth Green
as
Self
'Weird Al' Yankovic
as
Self
Paul McGuigan
Director
Rose Byrne
as
Alex
Mark Camacho
as
Bartender
Matthew Lillard
as
Luke
Antony Starr
as
Billy Newwood
Seth Green
as
Dan Mott
Matthew Lillard
as
Jerry Conlaine
Dax Shepard
as
Tom Marshall
Al Rodrigo
as
Michael Cusack
as
Nugget
Matthew Lillard
as
(voice)
Lombardo Boyar
as
(voice)
Dee Bradley Baker
as
Esteban / Mr. Wickles / Cat Man
Frank Welker
as
Scooby Doo / Rudy / Fred / Nefario
Matthew Lillard
as
Shaggy Rogers
Cher
Director
Demi Moore
as
Claire Donnelly
Diana Scarwid
as
Marcia Schulman
Aaron Lustig
as
Tom
Matthew Lillard
as
Young Couple
Mackenzie Gray
as
Director
Matthew Lillard
as
Joel Brandt
Woody Jeffreys
as
Patrick
Paul Lazenby
as
Tractor
Til Schweiger
as
Mark
Devon Sawa
as
Sean
Matthew Lillard
as
Stevo
Matthew Lillard
as
Self
David Dastmalchian
as
Self
Uwe Boll
Director
Brian White
as
Commander Tarish
Matthew Lillard
as
Duke Fallow
Jason Statham
as
Farmer
Claire Forlani
as
Solana