Casper: Mae Questel, Norma McMillan, Gwen Davies, Cecil Roy
Narrator (Casper): Frank Gallup
Little Audrey: Mae Questel
Herman the Mouse: Arnold Stang
Katnip the Cat: Sid Raymond
Baby Huey: Sid Raymond
Buzzy the Crow: Jackson Beck
Beany Boy: Jim MacGeorge
Cecil, the Sea-Sick Sea Serpent: Irv Shoemaker
Captain Huffenpuff: Jim MacGeorge
Dishonest John: Irv Shoemaker