Simon Cowell has denied rumours he's going to appear on this series of The X Factor UK, but says never say never.

Cowell said: "For the moment, I'm not going back but I wouldn't rule it out in the future. I do miss it."

The music mogul also revealed that The X Factor will have an Olympic twist this year.

"We are going to something around the Olympics on one of the live shows. I love having heroes on my show," he added.