You can still have chemistry on screen without getting on with the person. But it just makes your job a lot easier if you don't have to gird your loins, if that's not quite the right phrase, every time you're going to do a scene with that person.
“And when you really think about the 9-11 event, the horrific attack on our land here in America and the death of three thousand of out loved ones, it was a defining moment.”