The TV and radio presenter will don her dancing shoes and hit the dancefloor when the BBC show returns to our screens next month.
A source told The Sun: “Vanessa will be fabulous. She is lots of fun and always up for being outrageous, which is just what Strictly needs.
“She has had problems with her weight in the past so this is a brilliant way for her to get fit and have a laugh at the same time.”
It's not the first time Vanessa, 51, has taken part in a dance show. She channelled her inner Cher - complete with black wig and revealing leotard - to perform on 'Let's Dance For Comic Relief' back in March.
'Desperate Housewives' star Teri Hatcher, Olympic swimming heroine Rebecca Adlington, members of JLS and James Middleton's girlfriend, actress Donna Air are also rumoured to be taking part.