Ethan Spaulding Director Frank Welker Scooby-Doo, Fred Jones Actor Matthew Lillard Shaggy Rogers Actor Kate Micucci Velma Dinkley Actor Grey DeLisle Daphne Blake, Daphne Blake Actor, Voice Jeff Bennett Deputy , Museum guide Voice Kate Higgins Brenda Voice Josh Keaton Tommie , Chad Holdout Voice Aaron Preacher Screenwriter Emily Brundige Producer Rick Morales Producer Sam Register Producer Jill Wilfert Producer Robert Fewkes Producer Jason Cosler Producer