She won't give up trying to tell the stories that are difficult to hear.

Angelina Jolie released the trailer for her new Netflix passion project First They Killed My Father yesterday, and to make it authentic, she only used Cambodian actors and survivors of the genocide and narrated it in the native Khmer.

The film is based on an autobiography of Cambodian human rights activist and friend of Jolie’s Loung Ung, and it details the atrocities of the Khmer Rouge communist party in the 1970s.

"It's the first time there's something on this size about this war in this country. I feel like nobody is here for themselves and everybody here to do any job is here to put something forward and help their country speak," she explains in the clip.

The region holds a special place in the Oscar winner's heart, as she shot Lara Croft: Tomb Raider there in 2001 and adopted son Maddox from an orphanage in Battambang, Cambodia, in 2002. Her eldest son inspired her to take on the movie.

"He was the one who just called it and said he was ready and that he wanted to work on it, which he did. He read the script, helped with notes, and was in the production meetings," she told The Guardian.

First They Killed My Father will premiere in Siem Reap, Cambodia on February 18, and will be released globally on Netflix later this year.