"I’ve met very important people in my life doing films.Sometimes that had consequences that were just awful for everybody involved. Everybody makes mistakes dating people they work with." "They’re whom I’m attracted to," Hartnett said of his many A-list exes."Because I share experiences with them and understand a bit about what they are and what they do.If I were able to go back in time, I don’t know if I could have done anything any different." PHOTOS: Friendly celebrity exes The one regret he has, however, is not working with Christopher Nolan on. " Eventually, he processed the magnitude of his mistake.
Click through the slideshow to see who they are, then tell us: would you date your bestie's ex once his or her relationship was over or would that person be strictly off limits?A few months after filing to divorce Richie Sambora in February 2006, Heather Locklear learned that her soon-to-be ex-husband had hooked up with the couple's friend and neighbor, Denise Richards.Not long after, Richards, who was going through her own split with Charlie Sheen at the time, opened up to magazine about her falling out with Locklear: "Unfortunately, our friendship had to dissolve and I'm sad about that.actor, 36, who was once notorious for romancing his costars , told the mag that doing so has worked out in his favor — for the most part.PHOTOS: Costar couples "I think it’s a respectable way of going about it,” he said of dating his costars.