CANNES, France: In Terrence Malick's “The Tree of Life,” which premiered this week at the Cannes Film Festival, Brad Pitt plays a father of three in a drama that deals with the biggest of questions about our place in the cosmos. In his home life, Pitt and Jolie are parents of six. For Pitt, who was childless into his 40s after his marriage with Jennifer Aniston broke up, it all happened in just a few years. “I know it seems extreme from the outside, but I've always kind of operated this way. When I know, I know, and why mess around?” Pitt, 47, said in an interview.