Keith Allen has insisted his documentary about the death of Diana, Princess of Wales, is not "a sensationalist film".
The work, called 'Unlawful Killing', was shown to invited journalists at the Cannes Film Festival yesterday.
Allen told a press conference: "I didn't want to make a sensationalist film, I don't believe it is a sensationalist film. I think it is a very forensic analysis of a process, a British legal process, and I think it reveals things that, I'm sorry, don't add up."
The comic, whose daughter is pop star Lily Allen, said he had tried to get funding for the film from Channel 4, Channel 5, Sky and the BBC but had been turned down by them all. He then approached Mohamed Al Fayed, whose son, Dodi, also died in the 1997 Paris crash that killed Diana.
A spokesman for Mr Al Fayed confirmed that the former Harrods boss had provided around £2.5m (€2.8m) to fund the documentary.
The film features contributions from the late Tony Curtis, Lauren Booth, George Galloway and Mr Al Fayed.