KATHERINE HEIGL, GREY’S ANATOMY
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Katherine Heigl’s exit from Grey’s Anatomy was a bitter pill for the producers. She was notorious for her on set behavior and series creator Shonda Rhimes admitted to Hollywood Reporter that Katherine’s behavior influenced her management of her subsequent hit shows. At that time, Katherine was being offered $12 million a movie, and she took advantage of the fact to re-negotiate her contract with a huge raise and then she wanted to leave! She did leave eventually, but her movie career never took off either.