TV
Rex Features
The one-off sees Piper meet real-life call girl Dr Brooke Magnanti, who wrote the Belle de Jour story detailing her exploits as a working prostitute in London.
Magnanti said of the special: "This show will be the last word on what it was like to be Belle: how my sexuality was formed, how I came to the work, what it's like to be portrayed on TV.
"Viewers will get an exclusive look at the real woman who lived as Belle, actually becoming her one final time."
Piper added: "I am really looking forward to catching up with Belle again."
Billie and the Call Girl Bare All is expected to air on ITV2 in 2010.
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