Brad Pitt and Angelina Jolie pose with fans as they arrive for the World Premiere of World War Z at a central London cinema, Sunday, June 2, 2013. The couple said they had been moved by the outpouring of public support that followed Jolie's disclosure. Jolie told reporters she felt great, and had "been very happy to see the discussion about women's health expanded" by her announcement. "And after losing my mom to these issues, I'm very grateful for it, and I've been very moved by the kind of support from people," she said. On Sunday the couple walked a black, rather than red, carpet at the world premiere of "World War Z," which stars Pitt as a United Nations employee battling to save the world from a zombie apocalypse. "I have such respect for her," Pitt said. The fact that she would not be frightened of this, what she would have to go through to do this, to take this specter away from our family and ensure that she would be there longer for our family, and the kids ... I get very emotional about it. "I did not expect what a tipping point, how much it would mean for others to hear her stories, others that might be wrestling with the same things," he added. Rock band Muse performed an outdoor concert Sunday for the premiere of the shot-in-Britain film, which producers hope will be a summer blockbuster. Associated Press Writer Holly Cassidy contributed to this report.