Frank Welker

Scooby-Doo / Fred Jones (voice) (archive footage)

Casey Kasem

Shaggy Rogers (voice) (archive footage)

Grey DeLisle

Daphne Blake (voice) (archive footage)

Mindy Cohn

Velma Dinkley (voice) (archive footage)

Miranda Cosgrove

Miranda Wright (voice) (archive footage)

Jeff Bennett

General Niedermeyer (voice) (archive footage)

James Arnold Taylor

Frankie Martin / Shawn (voice) (archive footage)