• Grey Heffley as Larry Daley
  • Rowley Jefferson as Nicky Daley
  • Holly Hills as Mindy
  • Mr. Jefferson as Theodore Roosevelt
  • Chirag Gupta as Ahkemenrah
  • Rodrick Heffley as Ahkemenrah's Dad
  • Mr. Gerabit as Lancelot
  • Peter Griffin (from Family Guy) as Jedediah
  • Frank Heffley as Dr. McPhee
  • Ned Flanders (from The Simpsons) as Octavius
  • Ashley (from Alvin and the Chipmunks: The Road Chip) as Madeline Phelps
  • Agent Suggs (from Alvin and the Chipmunks: The Road Chip) as Attila the Hun
  • Lois Griffin (from Family Guy) as Sacagawea
  • Homer Simpson (from The Simpsons) as Cecil
  • RJ and Verne (from Over the Hedge) as Gus and Reginald
  • Patty Farrell as Shepseheret
  • Marge Simpson (from The Simpsons) as Red Carpet
  • Miles (from Alvin and the Chipmunks: The Road Chip) as Robert Fredericks
  • Susan Heffley as Andrea
  • Ryan & Xander (from Alvin and the Chipmunks: The Squeakquel) as Passerby and CJ

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