• Diesel 10 as Horrid Henry (Not Spencer, Spencer may have been a real villain in HOTR, but he became good in the end, whereas Horrid Henry was never good)
  • Rosie as Perfect Peter
  • Thomas as Brainy Brian
  • Henry as Anxious Andrew
  • Annie/Clarabel as Gorgeous Gurinder
  • Emily as Prizzy Polly
  • Diesel as Soggy Sid
  • Elizabeth as Rich Aunt Ruby
  • Mavis as Sour Susan
  • Daisy as Moody Margret
  • James as Beefy Bert
  • Boco as Aerobic Al
  • Smudger as Rude Ralph
  • Trevor as Dizzy Dave
  • Toby as Jolly Josh
  • Gordon as Tough Toby
  • Stepney as Kind Kasim
  • Spencer as Stuck Up Steve
  • Duck as Tidy Ted

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