• Jackson Curtis as Arnold
  • Dr. Adrian Helmsley as Gerald
  • Kate Curtis as Rhonda
  • Noah Curtis as Ernie
  • Lilly Curtis as Sheena
  • Dr. Gordon Silberman as Harold
  • Thomas Wilson as Dino Spumoni
  • Dr. Laura Wilson as Mitzi
  • Carl Anheuser as Coach Wittenberg
  • Charlie Frost as Grandpa Phil
  • Nima as Stinky
  • Grandfather as Principal Wartz
  • Sonam as Sid
  • Grandmother Sonami as Grandma Gertrude
  • Tamara Jikan as Helga
  • and more

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