Don't expect to see Brad Pitt on the big screen for much longer. In an interview with Australia's 60 Minutes, he was asked how much longer he'd like to keep acting. His answer: "Three years." The 47-year-old actor says he plans to step off camera by the age of 50. Early retirement? What will he do at 50? "Hell if I know!" he said, adding, "I am really enjoying the producing side and development ...