Angelina Jolie inadvertently resorted to method acting on the set of new movie A Mighty Heart, when she learned her mother had died before shooting a crucial scene. Marcheline Bertrand passed away in January (07) after a long battle with cancer, just days before Jolie acted out the moment her real-life character Mariane Pearl discovered her journalist husband Daniel Pearl had been executed in Iraq. Jolie, who recently described filming the scene as "the hardest thing I've ever done", says, "By some strange twist my mother passed away just before we shot that. "It was such a great reminder of Mariane's strength in that moment and how lucky I was to have had all those years with my mother. "When I went on set, everyone was saying, 'I'm so sorry for your loss' to me, and then they were saying the same thing to me as Mariane in the scene. "It was really strange."