Simon Cowell has revealed that he is making the most expensive gameshow in television history, describing it as the "biggest thing" he's ever done.
The £15million programme for ITV will be called Red or Black and is set to air over a week this autumn.
Every night one contestant could become a millionaire by choosing either red or black on a giant roulette wheel.
Music mogul Cowell said:
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version of the show
"This show is not about talent or skill it is just down to luck. This has never been done before. It is big event TV.
"Every single night for a week viewers will see someone at a giant wheel, risking their luck to win a million. You have to do it - there is no way of opting out.
"It's monstrous the size of this show. It's one of the biggest things I have done."
The first stage of the show is filmed at Wembley Arena and will involve thousands of contestants attempting to predict the outcome of a series of challenges.
Those who guess correctly will move on to the next round. There will be 10 stages in total and each contestant has to predict an outcome with a 50/50 chance of getting it right.
Ant McPartlin and Declan Donnelly, who already work with Simon on Britain's Got Talent and the X Factor, will host the programme.