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