Cheryl Cole has supposedly sealed a £1.5 million deal to return as a judge on UK X Factor.

The singer will be returning to the show for one season after allegedly making peace with Simon Cowell.

Cheryl and Simon were rumoured to have fallen out after he fired her from the X Factor US after taping just one episode in 2011.

But after months of negotiations, it looks like Cheryl has forgiven Simon for his past actions.

“The [£1.5 million] deal was done over the weekend. Simon is absolutely delighted to have her back on the judging panel,” a source told UK newspaper The Mirror.

“Over the last 18 months, Cheryl and Simon have got back in touch and slowly repaired their relationship. And in January they had dinner with Peter Fincham at Simon’s London house. There has been to-ing and fro-ing but the deal was finally done in the last 48 hours.”

Simon confirmed the news via his Twitter account on Monday night, posting “It's official. Cheryl is back” to his 9.5 million followers.

While negotiations were allegedly happening right up until the announcement was made, Simon’s confirmation ends months of speculation that Cheryl would return to the reality singing competition for the first time since 2010.

"Simon is delighted that she is back. With him and her on the panel it’s a dream ticket,” the source added.

“Simon was always very sad about the way things turned out over there and especially the way his relationship disintegrated. Slowly but surely they got things on an even keel and now they are stronger than ever. It was destiny they would be working together again.”