X Factor 2011 finalists joined by One Direction and JLS for charity single 'Wishing On A Star'

It must have been Simon Cowell's dream to merge the X Factor finalists with former groups from the hit show - and now he has done just that.

The reality show's 15 acts were joined by boy bands JLS and One Direction today as they filmed the music video for their cover of the Rose Royce hit, Wishing On A Star.

The famous faces looked all wrapped up as they donned Winter coats and jumpers for the Autumnal-themed shoot.

Living the dream: The 15 X Factor finalists recorded the music video for their charity single in which they collaborate with JLS and One Direction

The X Factor hopefuls who were voted off the show in recent weeks looked just as pleased to be there as the competition's remaining contestants.

Johnny Robinson, Sophie Habibis and Sami Brookes were pictured together in between takes and still looked like the best of friends.

Kitty Brucknell and 2 Shoes member, Charley Bird were also relaxing behind the scenes as they had their hair and make-up done.

Remaining finalist, Janet Devlin, preferred to relax on her own as he listened to music via headphones on a sofa, but once the 15 acts were all back together to film their scenes, they looked happy to be reunited.

'Absolute pleasure': Foursome JLS wrapped up for the Autumnal shoot alongside the finalists

We're back: One Direction were invited back to sing on a charity single for a second time by Simon Cowell

Movember supporter, Marcus Collins, was seen filming his own solo wearing a black leather jacket and surrounded by Autumn leaves.

And Johnny joined Craig Colton - who left the show last weekend - to belt out the tune.

Foursome JLS looked like true professionals as they sang alongside one another and showed off their best hand gestures.

One Direction were also surrounded by piles of leaves as they recorded their part for the charity single.

Simon Cowell's music label, SyCo has announced they will be donating 100% of the single's profits to the children and young people's charity, Together For Short Lives.

Doing their bit: Girl group Little Mix joined the rest of the finalists to record their part for the music video

'Having worked close hand with this charity and seeing the amazing work they do for kids and their families who need help and support, I am thrilled that the X Factor charity single this year will benefit this charity,' the music mogul said.

The groups recorded the single in London, and it is the fourth charity release from the x Factor.

'We are delighted to be the beneficiary of this year’s X Factor charity single,' said Barbara Gelb, CEO of Together For Lives.

'The money raised from this single gives us the opportunity to improve the lives of these children and families – and crucially raise awareness of the valuable support they need, wherever they live and for as long as they need it.

  Past and present: Former contestants Johnny Robinson and Craig Colton (L) and current finalist Marcus Collins recorded their own scenes amongst the Autumn leaves

Still together: Boy band The Risk looked close as they sung with each other whilst being filmed

'The addition of two chart topping groups to sing with the contestants means that we can now tell even more people all about what it's like for children who are unlikely to reach adulthood and their families and, we hope, raise even more money to support them. Every single bought will make such a difference.'

It seems the famous boy bands were more than happy to comply with JLS saying: 'It's an absolute pleasure to have been invited by Simon to feature on the new X Factor charity single.

'Working with all the finalists and of course One Direction will be amazing. It's all for a great cause.'

Enjoying her own company: Janet Devlin was spotted listening to some music in between takes

And the five young singers agreed, saying: 'We're really excited to be singing on the X Factor charity single for a second year in a row.

'Together For Short Lives is an amazing and important charity and we're honoured to be asked by Simon to help raise lots of money for them.'

Luckily the seventies classic is a hit amongst the show's finalists.

'It's a fantastic song choice, filled with hope,' said Marcus. 'This song is one of my favourites of all time.'

  Enjoying the perks: 2 Shoes member Charley Bird (L) and Kitty Brucknell looked relaxed as they had their hair and make-up done ahead of the shoot

And his close friend, Craig agreed with him, saying: 'It's an honour to record this song, and an honour to be a part of a charity with such a great cause.'

Marks and Spencer will be selling the single, following their collaboration with the finalists for their Christmas advert.

It will be available to download on November 27 and to buy as a CD the following day.