Frank Welker

Fred Jones (voice) (archive footage)

Casey Kasem

Shaggy Rogers (voice) (archive footage)

Nicole Jaffe

Velma Dinkley (voice) (archive footage)

Heather North

Daphne Blake (voice) (archive footage)

Don Messick

Scooby-Doo (voice) (archive footage)

John Stephenson

Redbeard the Pirate (voice) (archive footage)

Scatman Crothers

(voice) (archive footage)

Michael Bell

(voice) (archive footage)

Stu Gilliam

(voice) (archive footage)

Henry Corden

(voice) (archive footage)

Vic Perrin

(voice) (archive footage)

Meadowlark Lemon

(voice) (archive footage)

Joseph Barbera

William Hanna