Nick Palatas

Shaggy

Hayley Kiyoko

Velma

Frank Welker

Scooby-Doo (voice)

Robbie Amell

Fred

Kate Melton

Daphne

Benita Ha

Mom

Shawn Macdonald

Principal Deedle

C. Ernst Harth

Janitor

Garry Chalk

Vice Principal Grimes

Kurt Evans

Dad

Kira Clavell

Reporter

Lorena Gale

Librarian