Kristen Stewart threatened to sue Joan Rivers

Joan Rivers has claimed that Kristen Stewart threatened to sue her for suggesting that the young actress got movie roles by having affairs with her directors in her new book.

The 'Fashion Police' star was contacted by Stewart's camp, who threatened to sue her for defamation unless she removes the part from her book 'Diary of a Mad Diva', reported TMZ.

Rivers, 81, said the book is meant for laughs and it is stated in the prologue. It is not clear whether Stewart will go ahead with the case.

Rivers, known for her controversial comments, poked fun at Stewart's affair with married director Rupert Sanders who worked with her in 'Snow White and the Huntsman'.