• 
  Dave Franco

  Dave
• 
  Denise Gorzelanny

  Grandma (voice)
• 
  Roger Jackson

  Mr. Sprinkles (voice)
• 
  Brendon Small

  Pointy Thing (voice)
• 
  Fred Tatasciore

  Gluko / Kitty Num Nums (voice)
• 
  James Arnold Taylor

  Lennon (voice)
• 
  Dana Snyder

  Grandma (voice)
• 
  Karlo Hackenberger

  Gluko (voice)

• 
  Matti Klemm

  Bubble Monster (voice)
• 
  Jan Makino

  Lennon (voice)
• 
  Alex Jayne Go

  Little Bubble (voice)
• 
  Anna Gamburg

  Little Bubble (voice)
• 
  Simon Kunze

  Bubble (voice)
• 
  Elias Kunze

  Bubble (voice)
• 
  Achim Götz

  Gesang (voice)

• 
  Henrik Ilgner

  Gesang (voice)