Cast
- Thumbelina - Lori Loud
- Prince Cornelius - Bobby Santiago
- Jacquimo - Rapido
- Thumbelina's Mother - Rita Loud
- Hero the Dog - Bernie
- Baby Bug - Ko
- Gnatty - Mabel Pines
- Li'l Bee - Dipper Pines
- Mrs. Toad - Lord Dominator
- Mozo - Tom
- Gringo - Varian
- Grundel - Grim Gloom
- Berkeley Beetle - Vlad
- Bumblebee - Rainbow Dash
- Mrs. Fieldmouse - Ms. Keane
- Mr. Mole - Professor Utonium
- Mrs. Rabbit - Frankie Foster
- Mr. Fox - Burt
- Mr. Bear - Sharko
- Queen Tabithia - Maria Santiago
- King Colbert - Jonah Bishop
- The Reverend Rat - Francoeur
- Good Witch - Lacey Shadows
- Blue and Green Fairies - Teodora and Elodie
- Green and Blue Fairies - Jenny Wakeman and Amy Rose
- Gnatty's Mother - Carol
- Romeo - Grim Reaper
- Juliet - Garnet