Secret Diary of a Call Girl is a British television drama broadcast on ITV2 from 2007 to 2011 based on the blog and books by the pseudonymous `` Belle de Jour , '' starring Billie Piper as Belle , a high-class London call girl .
Secret Diary of a Call Girl ( also known as Secret Diary ) is a British television drama broadcast on ITV2 starring Billie Piper as `` Belle '' , a high-class London-based call girl .