- Eddy's Brother as Horrid Henry
- Eddy as Perfect Peter
- The Mayor (from The Powerpuff Girls) as Henry's Dad
- Sara Bellum (from The Powerpuff Girls) as Henry's Mom
- Plank as Fluffy the Cat
- Ed as Spotless Sam
- Edd as Brainy Brian
- Sarah as Moody Margaret
- May Kanker as Sour Susan
- Lee Kanker as Miss Battle-Axe
- Marie Kanker as Lazy Linda
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