Team GB Olympic gold medallists Jessica Ennis, Mo Farah, Chris Hoy and Bradley Wiggins have reportedly been signed up as mentors on the X Factor.

Simon Cowell has enlisted the champions as motivators for his singing hopefuls, according to The Mirror.

And they didn't come cheap, with the deal rumoured to have cost nearly £1million.

However, Chris Hoy has denied that he will be appearing on the show. He tweeted: "Some amusing stories in press about me being a mentor on X-Factor; that's the first I've heard about it! #dontbelievethehype!"

He added: "And no I'm not doing Strictly either!!"

The paper reports that the special Olympic episode will be screened next month, as part of the first live show of the series, and that the contestants will sing sports themed songs such as Gold by Spandau Ballet, The Winner Takes It All by Abba and Tina Turner’s Simply The Best.

jessica ennis
Jessica Ennis is one of the Team GB athletes who will appear on the X Factor

ITV have been quick to build a relationship with the popular athletes. This Saturday saw Jessica Ennis and Tom Daley appear with Usain Bolt on the Jonathan Ross Show, as the chatshow returned for a new series.

Tom Daley caused quiet a stir as he jokingly turned up in a shirtless collar and swimming trunks, describing it as his version of 'smart-casual'.

WATCH: Ella Stuns X Factor Judges With An Incredible Voice And Her Own Song - The Best Performance?

The swimming sensation is also apparently planning a foray into TV, considering work as a presenter once his Olympic commitments are finished.

Meanwhile, The Sun reports ITV have approached members of Team GB, such as cyclist Wiggins, to compete in I'm A Celebrity... Get Me Out Of Here!

PHOTOS: X Factor returns! All the photos from episode one...

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    Alexander, or should that be Rod Stewart?

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