The singer hinted at a reunion after spending time with Gary Barlow, 37, Mark Owen, 36, Jason Orange, 38, and Howard Donald, 40.
'We got together a lot over the summer,' he writes on his blog. 'It was amazing. Weve all matured a lot since we parted.
'Im very pleased to say the differences weve had have just melted away.
'I celebrated by getting the Take That symbol tattooed on my right arm.'
And Robbie, 34, says he's a fan of their new material.
'I love the new album too havent stopped listening to it,' he writes.
'Id love to be in the band again but Ive got some unfinished business of my own.'