2. It has Sheridan Smith as you’ve never seen her before 

Yes, THAT Sheridan Smith. The BAFTA Award-winning actor and all-round entertainment superstar steps away from ruling ITV to take on the role of Zoe’s wicked stepmum, Sheila. A woman who is so evil that she’s willing to help a nasty burger man mince her daughter’s best friend, and so lazy that she makes her stepdaughter pick her nose for her. Ewwwww. 

3. The rest of the cast is pretty awesome, too

Along with stellar performances from Walliams and Smith, Ratburger also features fantastic turns from Waterloo Road’s Mark Benton, The Young Ones’ Nigel Planer and Law & Order: UK’s Ben Bailey Smith. Benton plays Zoe’s barely-around father, Planer is her headmaster and Smith is a celebrity chef.

4. The costumes are epic

We’re not sure how long it took the make-up department to transform Walliams and Smith into their characters, but it was certainly worth it. As you can see from the picture above, the Britain’s Got Talent judge is practically unrecognisable as sunglass-wearing, sideburn-heavy villain Burt; while the Cilla star is a world (and several stone) away from her usual showbiz glamour.  

5. Sky One has impressive festive form

Let’s be honest. A book about a bullied child attempting to stop her stepmum and a shady burger man cooking her pet rat doesn’t instantly scream “feel-good family television”. But here’s the thing: two years ago, Sky One turned a classic book about a monster who scares people into the brilliant and touching Fungus The Bogeyman miniseries. And, in 2016, the channel transformed a fantasy novel about an orphan slaying dragons into the funny, exciting and magical The Last Dragonslayer. Conclusion? Don’t judge this book by its cover. Tune in and trust Sky One to do the festive telly business.

Want more festive films, TV and sport? Check out our Christmas homepage!