We all have those people that we work with but don’t necessarily like. But, for the sake of our sanity due to having to see them everyday, we stay cordial. Some may even call it amateur acting. Well, what about the professionals then? Knowing that it’s not possible to love everyone that you work with, you have to assume that the same goes for stars in Hollywood. Check all of these co-stars who fooled us well with loving each other on the big screen but actually hated working together in real life.