It’s a time-tested adage: Celebrities who work together sleep together. And yet — as we’ve seen in the cases of everyone from Adam Brody and Rachel Bilson to Penn Badgley and Blake Lively — rarely does a relationship between two TV co-stars last forever. So it goes that after nearly two years of marriage, Dexter stars Michael C. Hall, 39, and Jennifer Carpenter, 31, who plays Hall’s foster sister on the show, are getting a divorce. Better to have loved and lost, of course, but they still have to film together next season. [News Briefs/EW]