- Sly as Horrid Henry
- Bumpy Dog as Perfect Peter
- Noddy as Henry's Dad
- Tessie Bear as Henry's Mum
- Sally Skittle as Gorgeous Gurinder
- Mr. Uppity (from Mr. Men) as Stuck-Up Steve
- Martha Monkey as Moody Margret
- Dinah Doll as Sour Susan
- Mrs. Noah as Prissy Polly
- Mr. Milko as Brainy Brian
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