Would you want to work with your ex after a breakup? Celebrities often fall for their co-stars and, when those relationships don't work out, sometimes even have to continue to act alongside each other. Irish actress Ruth Negga and English actor Dominic Cooper, who play a couple on AMC series "Preacher," dated for eight years before news of their breakup made headlines in April 2018. Though their romance ran its course, multiple reports claimed the two remained friends in the wake of their parting. Keep reading to see which other stars had to work with their exes after breaking up.