• Bulgy as Horrid Henry
  • James as Perfect Peter
  • Mrs. Percival as Mum
  • Mr. Percival as Dad
  • The Spiteful Breakvan as Fang the Hamster
  • Ivo Hugh as Fluffy the Cat
  • Alfred the Loaned B12 (a made-up character) as Mutant Max
  • Max as Rude Ralph
  • Monty as Mischievous Mike
  • Elizabeth as Moody Margaret
  • Caroline as Margaret's Mum
  • Edward as Margaret's Dad
  • Madge as Sour Susan
  • Arthur as Brainy Brian
  • Douglas as Anxious Andrew
  • Isobella as Gorgeous Gurinder
  • Rosie as Lazy Linda
  • Molly as Singing Soraya
  • Emily as Prissy Polly
  • Patrick as Pimply Paul
  • Hiro as Beefy Bert
  • Whiff as Goody-Goody Gordon
  • Oliver as Tidy Ted
  • Duck as Spotless Sam
  • Flynn as Aerobic Al
  • Salty as Jolly Josh
  • Smudger as Greedy Graham
  • D261 as Slimy Sammy
  • Daisy as Miss Battle-Axe
  • Isabel as Mrs Battle-Axe
  • Mavis as Miss Lovely
  • Donald as Mr. Mossy
  • The Refreshment Lady as Miss OddBod
  • The Angry Policeman as Soggy Sid
  • Gordon as Stuck-Up Steve
  • Thomas as New Nick
  • Diesel 10 as Bossy Bill
  • George as Mr Nerdon
  • The Troublesome Trucks as The Killer Boy Rats
  • Bill and Ben as The Brickhouse Boys
  • Bertie as Peter's Angel
  • Norman as Peter's Devil
  • The Stationmaster's Wife as Rabid Rebecca

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