The girlband took a hiatus in 2009, but all the band members have agreed to reunite in six months after Nadine Coyle offered her support to Cheryl Cole following her axe from The X Factor USA, The Mirror reports.
"All is forgiven between Nadine and the rest of the band," a source told the newspaper. "It's all water under the bridge.
"They're excited they're going to be making a fresh start together on this next adventure of their lives. In six months' time, it'll be back to work as normal - they are itching to get back in the studio."
Girls Aloud, whose other members include Nicola Roberts, Kimberley Walsh and Sarah Harding, are also looking to write songs inspired by their personal experiences.
"Cheryl has been through a lot worse than the US X Factor. She's survived a marriage breakdown and almost died of malaria. She's made of tougher stuff," the source continued.
"In fact, they have all got so much more experience between them now. They have all been through so much and come out fighting, and they will reflect this in their tracks."
Walsh hinted earlier this year that Girls Aloud may reunite in 2012, while Cole was previously adamant that Coyle would return to the girlband.
Roberts recently released her debut single, 'Beat of My Drum', and will launch her album Cinderella's Eyes later this year.
Watch Girls Aloud perform 'The Promise' at the 2009 Brits below: