The Shallow Grave star, father of pop star Lily Allen, has directed new movie Unlawful Killing, which is due to be screened at the Cannes Film Festival in France on Friday (13May11).
The film documents the British royal's death in a 1997 Paris car accident, which also killed her companion Dodi Fayed and their chauffeur Henri Paul. A 2008 inquest ruled Paul caused the crash through grossly negligent driving.
Allen's decision to include a graphic black and white photograph of Diana moments after the crash, as rescue workers fought to save her, has been met with outrage from critics and Fayed's businessman father Mohammed Al-Fayed.
But the star has defended the use of the image in the movie in an article written for Britain's Daily Mail, stating, "The photo is not used in the film for the purpose of shock."
Allen has also addressed claims he made the controversial film for financial reasons: "I've been accused of seeking to make money out of a much-loved woman's death by making this documentary. That accusation is cheap, untrue and unworthy of those who make it.
"Frankly if it was simply money I was after, then I wouldn't have spent three long years making a documentary. I'd simply have signed up for another lucrative Hollywood blockbuster."