Robbie Williams has been back in the studio with Take That secretly writing new songs, it was reported today.
The 35-year-old star could also be performing with his former bandmates on stage soon, the Daily Mirror said.
The singer is said to have flown from Los Angeles to New York to meet the group for band member Mark Owen's stag night.
They then headed to the Electric Lady studios in New York's Greenwich Village to work together for the first time since Williams left to pursue a solo career, it was reported.
A source told the newspaper: "He is back with Take That in the studio and they're all writing together again. Robbie wouldn't be happy performing old Take That songs that he has had no part in.
"But if they can pen new tracks that they're all happy with, they'll record them and he will be back with them on stage."
A spokesman for Take That said he could not confirm the reports.
"I still have not heard word back from management about confirmation that he has been in the studio to write new material with them. I cannot confirm the story.
"At this point, all I know is that they are over there mixing this live album so there is every possibility that he popped in to just hear the new recording."
The reports come after rumours of a reunion have been circulating for months.