The 'Angels' hitmaker - who quit the band in 1995 to go it alone before returning to the group in 2010 - will sing a greatest hits set of his own tracks during the fivesome's 'Progress Live' tour concerts and it has now been revealed that Gary Barlow, Mark Owen, Howard Donald and Jason Orange will join him on stage for the segment.
A source told The Sun newspaper: "The guys agreeing to sing backing to Robbie's classics throughout the shows really is significant - all the hard feelings have been put behind them.
"At first he was to go it alone for a mid-set medley but they agreed they all needed to perform on the songs, even if it is just backing harmonies. They are not solo artists. They are Take That."
The tour will see the band perform live as a five-piece for the first time since the 90s, and it is reportedly set to cost nearly £50 million to stage.
A source previously said: "Sure, the band will be making good money. But it could be a hell of a lot more. You wouldn't believe the amount of cash they are pouring back into the stage sets and visual aspect of the show."
Take That's 'Progress Live' European tour is set to begin in Sunderland next Friday (27.05.11) and end in Germany on July 29.