Kim Cattrall & Sarah Jessica Parker (“Sex and the City”)

To the press, these two go out of their way to reassure the world that they are such good friends and adore each other. But the long-standing rumor is that Catrall is jealous of Parker and there was friction on set between them. Allegedly, their feud was reignited when Catrall announced the "SATC" film sequel without consulting Parker. SJP made a statement that she was "thrilled to know that Kim is excited, but all the deals are not yet done." And 'round and 'round it goes. [Celebitchy]