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Kristen Stewart is reportedly taking legal action against Joan Rivers for a dig in the comedienne's new book, Diary of a Mad Diva.

Rivers pokes fun at the starlet's affair with Snow White and the Huntsman director Rupert Sanders in one section of her book, writing, "Many stars only do one thing well. Of course, the best one-trick-pony is Kristen Stewart, who got a whole career by being able to juggle a director's balls." Burn!

There was photographic evidence of K. Stew getting hot and heavy with Sanders, which was pretty scandalous when you consider he was married to Liberty Ross at the time and she was with her uber dreamy Twilight co-star Rob Pattinson. Still, it's one thing to slam someone for cheating, but it's quite another to claim that it could have helped them professionally. K. Stew was definitely a huge star before that all went down...

So what does the aging queen of mean have to say for herself? After confirming to TMZ cameramen that she was being sued by Stewart, Rivers added, "She obviously didn't read our disclaimer, which says it's a comedy book. I can't wait to get her into court because I'm gonna get a puppet and I want her to show me on the puppet where she thinks I claim she touched her director. I am looking forward to it."

"Her lawyer contacted my lawyer, which shows the sense of humor she has," the 81-year-old star continued. "My answer to her was, 'Be glad you're not a Kardashian because they're mentioned a lot more in the book' ... I'm a comedian. I've been doing it for 50 years. If people don't get it, then don't come and see me. It's okay. Don't read the book. If you're gonna take it seriously, you're a fool."

So ... whose team are you on? K. Stew or Joanie?