Theo Stevenson
Horrid Henry
Acting
Anjelica Huston
Miss Battleaxe
Acting
Ross Marron
Perfect Peter
Acting
Parminder Nagra
Miss Lovely
Acting
Mathew Horne
Dad
Acting
Siobhan Hayes
Mum
Acting
Richard E. Grant
Vic Van Wrinkle
Acting
Prunella Scales
Great Aunt Greta
Acting
Scarlett Stitt
Moody Margaret
Acting
Lloyd Howells
Rude Ralph
Acting
David Schneider
Soggy Sid
Acting
Kimberley Walsh
Prissy Polly
Acting
Billy Kennedy
Weeping William
Acting
Noel Fielding
Ed Banger
Acting
Jo Brand
Demon Dinner Lady
Acting
Helen Lederer
Rich Aunt Ruby
Acting
Rebecca Front
Miss Oddbod
Acting
Jack Sanders
Aerobic Al
Acting
Reuben Lee
Brainy Brian
Acting
Helena Barlow
Sour Susan
Acting
Nikita Mistry
Gorgeous Gurinda
Acting
Frank Kauer
Spotless Sam
Acting
Joshua-James Thomas
Goody Goody Gordon
Acting
Tyger Drew-Honey
Stuck-Up Steve
Acting
Tamsin Heatley
Madam Tutu / Fang (voice)
Acting
Dominic Wood
2C4S Presenter 1
Acting
Richard McCourt
2C4S Presenter 2
Acting
Zac Gabriel Werb
Tidy Ted
Acting
Keely Cat Wells
Alice
Acting
Kia Pegg
Vicious Vicky
Acting
Sam Davis
Keepy Uppy Boy
Acting
Freddie Rose
Schoolboy (uncredited)
Acting
Harvey Walsh
Schoolboy (uncredited)
Acting