According to Extra, Brad Pitt and Charlize Theron have reportedly been dating since the holidays. A source said, ?They have been casually seeing each other for nearly a month now. They?ve been friends for some time." The source also revealed that the two "ironically" know each other through Theron's ex, Sean Penn. The two were spotted together in Los Angeles at the Chateau Marmont cozying up in a corner of the bar.