From The Frisky.
Leonardo DiCaprio vs Claire Danes
(Romeo + Juliet)
There was a rumor going around that Romeo and Juliet weren't so smitten with each other when the cameras weren't rolling. The rumor was that Claire found Leo to be "very immature" and ignored him as much as she could … you know, and still pretend to be madly in love with him.
Shannen Doherty vs Jennie Garth
(“Beverly Hills, 90210")
It was no secret that Shannen Doherty and Jennie Garth absolutely hated each other on the set of " Beverly Hills, 90210." In her memoir sTORI Telling, Tori Spelling claimed that the two's rivalry often escalated to the point of a fist fights. In an interview with Entertainment Weekly the no-longer-feuding pair set the record straight. They admitted to hating each other, possibly scratching one another, but no hitting.
Jennifer Grey vs Patrick Swayze
Jennifer Grey and Patrick Swayze actually worked together before Dirty Dancing and it didn't go so well. On the set of Red Dawn, "Jennifer chafed when I ordered her around and rolled her eyes when I stayed in character between takes," said Swayze. When they were reunited in Dirty Dancing they "ended up getting along, although [they] had a few moments of friction," Swayze admitted.
Ashley Judd vs Jason Patric
(Cat On A Hot Tin Roof)
Jason Patric hated working with Ashley Judd in Cat on a Hot Tin Roof so much that he publicly talked smack about her. "I loved saying the words and working with most of the people every night. I didn’t like my leading lady," he complained. "Ashley is just a lazy and arrogant actress. Let’s just leave it at that." Ouch.
Kim Cattrall vs 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 Cattrall is jealous of Parker and there was friction on set between them. Allegedly, their feud was reignited when Cattrall 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."
Joan Crawford vs Bette Davis
(Whatever Happened To Baby Jane?)
These bitter rivals originally fell out over actor Franchot Tone. But their feud lived on long after he was out of the picture. Their hatred reached its crescendo while working together on the set of Whatever Happened to Baby Jane?" They played all kinds of mean pranks on each other, and refused to use stunt doubles for their fight scenes. “The best time I ever had with Joan was when I pushed her down some stairs in Whatever Happened to Baby Jane?," Davis confessed.
(See more at The Frisky)