#10 Kevin Smith and Bruce Willis
Kevin Smith and Bruce Willis can’t stand each other. This comes as little surprise because both of them have dueled and burned bridges between them in the past. While working together on the film ‘Cop Out’ rumors were rife that there was plenty of drama on the sets. Smith had said that working on the film was ‘soul crushing’; while Willis had commented that it was ‘difficult’. Willis has even called Smith a ‘whiner’, although he has said that he does not want to call out the latter. Obviously, the two are quite far away from patching up with each other.