CANNES, May 22: Angelina Jolie takes on one of her most challenging roles to date in a film about Mariane Pearl, wife of Wall Street Journal reporter Daniel Pearl who was kidnapped and beheaded by militants in 2002.

“A Mighty Heart”, premiered at Cannes on Monday, is one of the most talked about films at the festival this year even though it is outside the main competition.

The movie unites Jolie with her partner Brad Pitt, who is a producer, and is directed by Britain's Michael Winterbottom, who has made films including “The Road to Guantanamo” and “9 Songs”.

It is based on Mariane's book “A Mighty Heart: The Brave Life and Death of My Husband Daniel Pearl”, which recounts the events leading up to and following Daniel's death when she was around six months pregnant.

The film takes the viewer into the teeming streets of Pakistan's southern port city of Karachi, where Daniel was abducted, although scenes involving Jolie were shot in India.

It paints a picture of chaos and confusion as Mariane, Pakistani intelligence, US consulate officials and Daniel's newspaper colleagues seek unsuccessfully to track him down via e-mail and mobile phone trails and old-fashioned police work.

They are up against not only a ruthless and professional group of abductors, but also prejudices in Pakistani society that led some to speculate that Daniel worked for US or Israeli intelligence and that India was behind the kidnap.

Jolie said she was nervous about getting the part of Mariane right, and that the film had a message beyond the gripping narrative and gut-wrenching finale.

“For me so much of why this film is important today was because I highly doubt there is anybody in this room who has more reason to hold hate inside herself than Mariane, and she doesn't,” Jolie told a news conference.—Reuters