David Walliams and Sheridan Smith star in the TV version of Walliams' children’s novel Ratburger, which comes to Sky One and NOW TV this Christmas. Walliams plays evil villain Burt and Sheridan is the horrid stepmother.

Ratburger follows a young girl called Zoe (Talia Barnett), whose stepmother hates her and whose dad (Mark Benton) is never around. When Zoe discovers a baby rat in her bedroom, she names him Armitage and they quickly become friends, especially when she discovers that he is no ordinary rat – he’s a rat that can dance. Zoe wants to show off her rodent pal’s skills at the school talent show, but her stepmother and shifty burger man Burt have other ideas. Most of which involve a mincer and putting rat burgers on the menu…

Jon Mountague, head of comedy, Sky, said: "Hilarious, gruesome and warm-hearted in equal measure, Ratburger is a terrific tale. It brings David Walliams and Sheridan Smith proudly into Sky One's cracking comedy line-up, alongside Jack Whitehall, Rupert Grint and Idris Elba."

The comedy also stars Mark Benton (The Halcyon, Waterloo Road) as Zoe’s dad, Nigel Planer (The Young Ones) as the Headmaster, and Ben Bailey Smith (David Brent: Life on the Road) as celebrity chef Charlie Jacobs. It was commissioned by Jon Mountague, Sky’s head of comedy, and written by Kevin Cecil (Gnomeo and Juliet, Billionaire Boy) and David Walliams, directed by BAFTA winner Matt Lipsey (Little Britain, Psychoville), executive produced by BAFTA nominee Jo Sargent (Miranda, Ab Fab) and produced by Joanna Hanley (Billionaire Boy) for King Bert Productions.

It will be available on Sky One and TV streaming service NOW TV in the UK and Ireland this Christmas.