On 15 November 2009, the real Belle du Jour, whose memoirs were the basis for this series, revealed that she was Dr. Brooke Magnanti, a research scientist and former sex worker from Bristol.
For the second season, a body double was used for the nude scenes because of Billie Piper's pregnancy.
Future Doctor Who (2005) star Matt Smith plays a man Belle meets in a wedding-gift shop and brings home with her. This is unusual because he is not a paying customer.
Iddo Goldberg and Ashley Madekwe were a long-term couple during production of the series and were married in June 2012.