Simon Cowell and his Overs category – Ben Haenow, Jay James, and Fleur East - Cheryl Fernandez-Versini and her girls, Lauren Platt, Chloe Jasmine and Stephanie Nala, Mel B and the boys, Jake Quickenden, Paul Akister and Andrea Faustini, and Louis and the groups, Blonde Electra, the New Boy Band, and Only The Young, are all getting ready to prove they won't crack.
With each judge also being given a wildcard, that's been picked by one of the other judges, they've got four apiece.
The bookies might have their favourites already, but after the first week's performances will all that change? Who will impress – and who will crumble?
The X Factor, ITV, 7.30pm
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