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.
“Just because you know umpteen billion scales, it doesn't mean you have to use them all in a solo.”
“Education is for improving the lives of others and for leaving your community and world better than you found it.”