Freddie Prinze Jr.
Sarah Michelle Gellar
Matthew Lillard
Linda Cardellini
Seth Green
Peter Boyle
Tim Blake Nelson
Alicia Silverstone
Neil Fanning
Pat O'Brien
Freddie Prinze Jr. as Fred Jones
Sarah Michelle Gellar as Daphne Blake
Matthew Lillard as Norville 'Shaggy' Rogers
Linda Cardellini as Velma Dinkley
Seth Green as Patrick
Peter Boyle as Old Man Wickles
Tim Blake Nelson as Jonathan Jacobo
Alicia Silverstone as Heather Jasper-How
Neil Fanning as Scooby-Doo (voice)
Pat O'Brien as Himself
Bill Meilen as Chauffeur
Zahf Paroo as Ned
Chris Gauthier as Daphne's Tattooed Fan #1 (as Christopher Gauthier)
Peter New as Daphne's Tattooed Fan #2
Morgan Brayton as Mullet Nerdette #1