Shannen Doherty
Shannen Doherty complained about the excess of drama on the set of Charmed, but somehow, the drama seemed to pop up again when she was cast in Beverly Hills 90210. She reportedly feuded with at least two of her co-stars: Jenni Garth and Tori Spelling. Garth described the feud between her and Doherty saying that they wanted nothing more than “to claw each other’s eyes out.”
C3P0 vs. R2D2
Okay, the feud wasn't between the robots but the actors themselves! It all started when Anthony Daniels said "hi" to Kenny Baker and was subsequently snubbed. Daniels was not happy about it. In fact, he said that he entered a "blazing rage." Whoops!