Gene Kelly

Jeremy Keen, the Peddler

Bobby Riha

Jack

Ted Cassidy

The Giant (voice)

Marian McKnight

Jack's Mother

Marni Nixon

Princess Serena (singing voice)

Chris Allen

Mouse (voice)

Dick Beals

Jack (singing voice)

Leo De Lyon

Woggle-Bird (voice)

Cliff Norton

Woggle-Bird (voice)

Janet Waldo

Princess Serena (voice)

Don Messick

Cat / Mice (voice) (uncredited)