• 
  Geoff Ward

  Mack
• 
  Derek Russo

  Swamp Ape 2
• 
  Jamil Malik

  Cheif Nadjo
• 
  Mike Lazar

  Jasper
• 
  Adam Brudnicki

  Ranger Steve
• 
  Robert J. Fox

  Professor Stein (as Robert Fox)
• 
  Justin Brackett

  Theo
• 
  Jackie Gonzalez

  Anna Marie

• 
  Vanessa Capriglione

  Lily
• 
  Elgin David

  Carl
• 
  Daryl Patrice

  Wendy
• 
  David Koenig

  Swamp Ape 1
• 
  Joseph Setinsek

  Volleyball player 1
• 
  Lina Dang

  Volleyball player 2
• 
  Duke Escobar

  Duke the dog