Bettina Bush

Rainbow Brite (voice) (as Bettina)

Pat Fraley

Lurky / On-X / Buddy Blue / Dog / Guard / Spectran / Slurthie / Glitterbot (voice) (as Patrick Fraley)

Peter Cullen

Murky Dismal / Castle Monster / Glitterbot / Guard / Skydancer / Slurthie (voice)

Robbie Lee

Twink / Shy Violet / Indigo / La La Orange / Spectran / Sprites (voice)

Andre Stojka

Starlite / Wizard / Spectran (voice)

David Mendenhall

Krys (voice)

Rhonda Aldrich

The Princess / The Creature (voice)

Les Tremayne

Orin / Bombo / TV announcer (voice)

Mona Marshall

Red Butler / Witch / Spectran / Castle Creature / Patty O'Green / Canary Yellow (voice)

Jonathan Harris

Count Blogg (voice)