Casey Kasem

~ as ~

Shaggy (voice)

Grey DeLisle

~ as ~

Daphne (voice)

Mindy Cohn

~ as ~

Velma (voice)

Kathy Kinney

~ as ~

Sheriff Ellen Perkins (voice)

Frank Welker

~ as ~

Fred / Scooby-Doo / Headless Snowman (voice)

Peter Scolari

~ as ~

Professor William Fagen Higginson (voice)

Mark Hamill

~ as ~

Tommy's Father (voice)

Daryl Sabara

~ as ~

Tommy (voice)

Jim Belushi

~ as ~

Asa Buckwald (voice)