Main Actor
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)