Washington: Kristen Stewart had threatened to sue Joan Rivers for writing in her book 'Diary of a Mad Diva' that she bought her way to stardom through casting couch.


Kristen Stewart. Pic/Santa Banta 

According to TMZ.com, the 81-year-old star called the 'Twilight' actress "one-trick-pony" in her book, saying that the 24-year-old beauty made her career by sleeping with a director, referring to her affair with the married director, Rupert Sanders.