Fred Tatasciore
— Gluko / Kitty Num Nums (voice)
James Arnold Taylor
— Lennon (voice)
Dana Snyder
— Grandma (voice)
Roger L. Jackson
— Mr. Sprinkles (voice)
Alex Jayne Go
— Little Bubble (voice)
Brendon Small
— Pointy Thing (voice)
Artie Esposito
— Puppeteer (voice)
Anna Gamburg
— Little Bubble (voice)
Denise Gorzelanny
— Grandma (voice)
Achim Götz
— Gesang (voice)
Karlo Hackenberger
— Gluko (voice)
Henrik Ilgner
— Gesang (voice)
Matti Klemm
— Bubble Monster (voice)
Elias Kunze
— Bubble (voice)
Simon Kunze
— Bubble (voice)
Jan Makino
— Lennon (voice)