Relationships take work. It takes years to develop chemistry with your partner. Finding out what makes them tick, hoping they tolerate your quirks. Even then, even after so much personal investment, it may not work out. When a casting director has to find actors to portray a romantic couple, people who have to act like they love each other, it can be an arduous task. While most movie sets are usually a friendly experience, with everyone getting along, every so often the people pretending to be in love don’t really like each other that much. Here are 10 Famous Movie Couples Who Hated Working Together.