While the pair played best of friends on Sex And The City, there are plenty of reports of Parker and Cattrall despising each other off camera. A rift developed between the two when Cattrall found out Parker was making quite a bit more than the rest of the cast.
Kenny Baker and Anthony Daniels (R2D2 and C3PO) were inseparable in the many, many Star Wars films they appeared in. Off screen, the actors behind the lovable droids were anything but friends.
Baker has gone so far as to call Daniels boring and unfunny. This is why fans of the movie series rarely see both actors appearing at Comic-Con’s and other conventions.