The film is based on the memoir of the same name by Loung Ung, whom Jolie befriended in 2002 after she first became a goodwill ambassador for the U.N. Ung was 7 years old when the Cambodian genocide began. "It actually in some ways been given even more because we had such a strong premiere in Cambodia and the push and ability to have it across the states", Angelina told Variety.
"I feel sometimes that my body has taken a hit, but I try to laugh as much as possible", she said.
Jolie adopted Maddox, her first child, from Cambodia, where her new film premiered in February.
Jolie said her first major movie as a director, the 2011 Bosnian war drama In The Land Of Blood And Honey, was prompted by her humanitarian work as a special envoy for the United Nations refugee agency. "As I go to sleep at night, I think, 'Did I do a great job as a mom or was that an average day?'"
"First They Killed My Father" will come in theaters and stream on September 15.
Speaking to "Entertainment Tonight Canada" about her colleagues and children, Angelina - who also has Shiloh, 11, Zahara, 12, as well as Knox and Vivienne, both nine - said: "It was a joy". "I thought, 'I'm not really sure I could do what needs to be done for her.' The coach had me play around with throwing my voice as big as it could go", she added. "I want them to respect people of diversity".
The star has been going through a tough personal time lately thanks to her split from Brad Pitt.
The actress was accompanied by her six children on the red carpet on Monday for the festival's premiere of her Netflix film, "First They Killed My Father". Jolie's daughter, Vivienne Marcheline Jolie-Pitt also made a cameo in the film as the young Princess Aurora.
"I wanted to learn more about the war of Yugoslavia". The actress bathed in compliments, noting that she looks flawless.
At the time, the actress discovered that she had a BRCA1 gene that increased her chance of having breast and ovarian cancer.