Eric Charbonneau/Invision for Warner Bros./AP Images
Maybe they split up over the outcome of one of the seasons?! Prior to their split, Penn revealed he and then-GF Theron watched the reality show together.
"We argue about whether or not we should fast [forward]," he told Jimmy Kimmel back in March. "I don't really want to hear the conversations, I want to know the decisions. You can decide on this one or this one. And I want to see somebody cry. And then see somebody get ecstatic and then see them cry."