Peter Kay as Big Chris (voice)

Richard Briers as Roobarb/Custard (voice)

Frank Welker as Scooby-Doo (voice)

Ken Barrie as Postman Pat (voice)

Neil Morrissey as Bob the Builder (voice)

Ringo Starr as Thomas the Tank Engine (voice)

Roy Skelton as Zippy / George (voice)

Jane Horrocks as Fifi Forget-Me-Not (voice)

Carole Boyd as Sara Clifton / Mrs. Goggins (voice)

Tim Whitnall as Teletubbies narrator / Flowertots characters (voice)

Keith Wickham as The Fat Controller (voice)

Oliver Postgate as Bagpus (voice)

Brian Cant as Miss Lovelace (voice)

Jimmy Hibbert as Ben (Flowerpot Man)/ Stretchy (voice)

Bernard Cribbins as Alderney / Orinoco / Wellington (voice)

Malcolm Lord as Bungle

Marc Silk as Flowertots / Molecom (voice)

Sylvia Anderson as Lady Penelope (voice)

Kulvinder Ghir as Ajay

Jonathan Kydd as Paddington Bear (voice)

John Thomson as Bill (Flowerpot Man)

David Graham as Brains / Parker / Thunderbirds (voice)

Martin Clunes as Stripy (voice)

Pui Fan Lee as Po

Mark Heenehan as Tinky Winky (voice)

Marcello Magni as Pingu (voice)

Simon Shelton as Tinky-Winky (voice)

John Simmit as Dipsy (voice)

Nikky Smedley as Laa-Laa (voice)

Brenda Longman as Soo

Steven Kynman as Fireman Sam

Charlotte Spencer as Angelina Mouseling (voice)

Casey Kasem as Shaggy Rogers (voice) (uncredited)