It had previously been reported that Cole was to join Barlow for the Judges' Houses stage of the show and would help the Take That star choose his top five contestants in the over-25s category.
The pair took to Twitter earlier today (September 8) to joke about Cole's involvement and to plan their outfits.
"@CherylCole just so we don't clash, I'm wearing the pink suit with the red shoes ;)" wrote Barlow, who is said to be making his final selections at a country estate in Northamptonshire.
"@Gbarlowofficial Got you !! ;) see you soon !!!" replied the Girls Aloud star shortly afterwards.
Simon Cowell - who is currently filming The X Factor USA - was said to have been unaware of Cole's plans to return to the show. However on a flight back to LA in the early hours, he gave the pair his approval, tweeting: "Welcome back Cheryl. X"
The latest episode of The X Factor, featuring Geri Halliwell as a guest judge, airs tonight at 8.10pm on ITV1.