Hollywood star Angelina Jolie has described the difficulties she had during the filming of her latest flick Changeling. Directed by Clint Eastwood, the film is set in Los Angeles in 1928 and follows the plight of Christine Collins - a woman trying to track down her kidnapped son. The mother of six said she found the film, which is based on a true story, very emotional. "When I first read the script, I couldn't put it down. And then I said no immediately. I didn't want to go near this project because it was too upsetting," she said. "But then I couldn't stop talking about her. I found myself sitting with people and wanting them to know about this extraordinary woman. "As a mom, it was horrible. I had my kids as much as possible at lunch and after doing a day at work I'd run home. I wanted to be silly, it was so emotional I found myself being goofy at home."