The musical, Pantos On Strike, has been devised by his best friend Jonathan Wilkes.

"Robbie's writing the first song for the show," Wilkes told told the Manchester Evening News. "He agreed to do that before he agreed to the Take That comeback.”

Williams said: "It isn't written yet, I hope I get it together."

Pantos On Strike stars Wilkes and comedian Paddy McGuinness, who is best known for his role in Phoenix Nights.

It is due to open at the Manchester Opera House in November.

As previously reported, Williams announced last week that he has rejoined Take That to release a new album.

(by Jason Gregory)