Joan Rivers is no stranger to a good fight.
And the gloves are definitely off when it comes to her and Gwyneth Paltrow.
Rivers visited Andy Cohen on Watch What Happens Live Wednesday night, and was asked by a viewer which celebrity had given her the most flak over her show, Fashion Police.
"The worst criticism was – ugh – Gwyneth Paltrow," Rivers said, grimacing. "She came in and yelled at us – she stood up; she can't sit down because she's got a stick up her rear end."
Rivers, however, declined to mention exactly what it was Paltrow said to her.
The pair do have a bit of a history: Paltrow once told Harper's Bazaar that she would never do Botox again, because her first experience with the procedure left her looking "crazy, like Joan Rivers."