The troubled ex-footballer will reportedly pocket £400k for appearing on the Italian version of the BBC ballroom show.
He is said to be hoping the show will help beat his demons with alcohol, as he leaves Britain for a few months to 'start again'.
A source close to the star told The Sun: “Paul is fit and is keen to show off his nifty footwork.
“He believes the show will give him a focus and help him stay off the booze.
“Paul is determined to stay on the straight and narrow. This high-profile TV appearance will help with that.”
Earlier this year, he admitted he was considering appearing on 'I'm A Celebrity… Get Me Out Of Here'.
Last month, Paul - who has battled problems with alcohol for years - admitted common assault and drunk and disorderly charges linked to an incident at a railway station in court.
He previously told 'Daybreak' he loves being sober, after spending a spell in a rehab facilty.
“Sometimes you try not to look too far ahead, you know? I just try and keep it in the day as you get told but I really love being sober," he said.
"Sometimes I wonder why I drink but for me it’s nice being tipsy but then I go too far. Sometimes I just don’t know when to stop.”