Raja Gosnell directed the two live-action Smurfs films, but before that, he directed 2002's Scooby-Doo and 2004's Scooby-Doo 2: Monsters Unleashed.
The Mystery Gang:
Matthew Lillard as Norville Rogers (Shaggy)
Freddie Prinze Jr. as Fred Jones
Sarah Michelle Gellar as Daphne Blake
Linda Cardellini as Velma Dinkley
Neil Fanning as the voice of Scooby-Doo
From the 2002 film:
Rowan Atkinson as Emile Mondavarious
Isla Fisher as Mary Jane
Scott Innes as the voice of Scrappy-Doo
Frank Welker, the original voice actor of Fred Jones, voiced one of the creatures in the film
From Monsters Unleashed:
Seth Green as Patrick Wisley
Peter Boyle as Jeremiah Wickles
Alicia Silverstone as Heather Jasper Howe
Tim Blake Nelson as Dr. Jonathan Jacobo
The Mystery Gang:
Matthew Lillard as Norville Rogers (Shaggy)
Freddie Prinze Jr. as Fred Jones
Sarah Michelle Gellar as Daphne Blake
Linda Cardellini as Velma Dinkley
Neil Fanning as the voice of Scooby-Doo
From the 2002 film:
Rowan Atkinson as Emile Mondavarious
Isla Fisher as Mary Jane
Scott Innes as the voice of Scrappy-Doo
Frank Welker, the original voice actor of Fred Jones, voiced one of the creatures in the film
From Monsters Unleashed:
Seth Green as Patrick Wisley
Peter Boyle as Jeremiah Wickles
Alicia Silverstone as Heather Jasper Howe
Tim Blake Nelson as Dr. Jonathan Jacobo
