Robin Williams
The Frog / Prince Robin
Teri Garr
Princess
René Auberjonois
King Ulrich
Candy Clark
Queen Gwynneth / Candy
Roberta Maxwell
Queen Beatrice / Griselda
Michael Richards
King Geoffrey
Donovan Scott
Hendrix / The French Chef
Charlie Dell
The Page
Van Dyke Parks
The Musician
Harry Benson
The Grandfather Clock
Eric Idle
Narrator
Shelley Duvall
Self - Host (uncredited)