Theo Stevenson
Horrid Henry
Anjelica Huston
Miss Battleaxe
Ross Marron
Perfect Peter
Parminder Nagra
Miss Lovely
Mathew Horne
Dad
Siobhan Hayes
Mum
Richard E. Grant
Vic Van Wrinkle
Prunella Scales
Great Aunt Greta
Scarlett Stitt
Moody Margaret
Lloyd Howells
Rude Ralph
David Schneider
Soggy Sid
Kimberley Walsh
Prissy Polly
When Henry fails yet again to hand in his homework for the umpteenth time, he has no idea that this will set off a chain of events which will see him forming an unlikely alliance with Moody Margaret, the infuriating girl next door, and his irritating little brother Perfect Peter, outwitting corrupt school Inspectors and toppling an evil Headmaster, winning a talent contest and facing his ultimate nemesis with no way out.
