The 53-year-old former model is said to have already started training for the BBC One ballroom competition, which returns to screens next month.
An insider told the Daily Express: "Jo is in fantastic shape, looks amazing and is going to be brilliant. She'll love to show Ronnie a clean pair of heels."
Jo was dumped by the Rolling Stone in July last year after he started a fling with bargirl Ekaterina Ivanova. She recently vowed not to "hide away" following the split, adding that she is looking forward to starting "a whole new life".
Actresses Lynda Bellingham and Zoe Lucker, Crimewatch presenter Rav Wilding and former boxing champion Joe Calzaghe have also been tipped for the forthcoming seventh series.