Yes, it's only April, but plans have been announced for the huge £2 MILLION production.
The show will take place at arenas in Birmingham and London and will include a cast of more than 100, with more than a few familiar faces.
There will also be a huge castle, '4D' effects, aerial acts and a 30 piece band.
Mel B will star as the wicked witch, Rylan her henchman and Strictly's Vincent Simone and Flavia Cacac will appear as Snow White's parents.
Rylan teased of his role: "I'm her funny bit on the side. I'm going to be pretty much me - biggest Spice Girl fan loving life."
Former X Factor judge Mel said: "I love panto and always take my kids, but I want to change the slightly cheesy image people have of the genre and present something on a spectacular scale whilst still retaining the traditional values.
"I am so excited by the show that I am hoping to have my daughter Angel play a version of mini-me in the mirror."
Also in the show is comic Paddy McGuinness, playing Muddles the court jester.
Paddy said: "I've never done panto before but I couldn't resist. The World’s Biggest Pantomime is going to be the best Christmas show ever, with amazing arena size special effects and a fantastic cast. If I wasn't in it, I'd buy a ticket myself to watch it! Oh yes I would!”