What movie, starring Renée Zellweger, was based on a book by the director's close friend? 
Sharon Maguire: Sharon Maguire (born 17 August 1961) is a film director who came to prominence with "Bridget Jones's Diary". Sharon Maguire:  The film was based on the book by her close friend Helen Fielding, and one of the main characters – "Shazza" – is allegedly based on Maguire.
i don't know