film, "first they killed my father" alongside the author of the book, and angelina's best friend, loung ung. step two? keep the kids busy while mama does her thing. >> yeah. >> reporter: angelina spent 20 minutes signing autographs and taking selfies. >> angie! >> we love you, angie! >> we're going to get the nudge when we have to get them. >> reporter: so exciting. and when that moment comes? >> what, kids kid, sorry. >> reporter: step three. drop everything. >> i'll get them. the boys will get them. >> reporter: outside, the kids posed alongside members of the cast. angelina immediately noticed 9-year-old twin vivienne looking a bit out of her element. angelina walks over and gives her a hug before they all find a buddy and go inside. >> how is traling with your mom? >> i don't know. >> reporter: and while 13-year-old pax couldn't resist giving 16-year-old brother maddox a little jab for his film credit. >> are you mad? >> answer some of the questions. >> reporter: angelina admits traveling successfully takes a ton of practice. >> they're getting older now. the older ones them younger one

her film, first i killed my father, alongside the author of the book and angelina's best friend, loung ung. step two, keep the kids busy while mama does her thing. angelina spent 20 minutes signing autographs and taking selfies. >> we're going to get the nudge when we have to get them. we did all this first. >> when that moment comes, step three. drop everything. outside, the kids posed alongside members of the cast. angelina immediately noticed 9-year-old twin vivienne looking a bit out of her element. angelina walks over, gives her a hug before they all find a buddy and go inside. angelina admits traveling successfully takes a ton of practice. >> they're getting older now, so the older ones help the younger ones and actually they're quite efficient. >> at the new york premiere, shiloh showed off her goofy side and was beaming with a nearly identical smile as her mom. and check out 9-year-old knox's carbon copy pout. angelina's father, jon voight, also came out to support the film, which was executive produced by angelina's 16-year-old son madmaddox. >> he's very sudious. when we did our

reporter: jolie teaming up with rithy panh to make the film based on the memoir of jolie's friend loung ung >> i think people sometimes when they talk about genocide and crimes against humanity and war, they forget the most vulnerable victims are the children. >> am i a prisoner? >> reporter: you did "in the land of blood and honey," "unbroken." what have they taught you if anything about the human cost of war? >> when you direct a film you spend years understanding, analyzing and i want to know how people get to a place where they do such harm to each other. this is not 40 years ago. this is today. we have 45 million people displaced today. we have so many ongoing wars. what is worse is then we could say if we knew, we know. we know so much now. if anything we see people more divided and see people encouraged to board up and wall up and divide more. so it is something we must be very conscious of today. >> reporter: the 42-year-old actress and humanitarian adopted her oldest son maddux from cambodia and the 16-year-old serving as an executive producer. >> he says he's very proud of beli be