The comedienne recently alleged that Clooney, who found fame as Booker Brooks on her sitcom ROSEANNE, posed for the saucy picture during a raucous drinking session, and allowed her to display the image in her kitchen.
She said, "We were all drunk, John Goodman took a picture of George naked with Groucho Marx glasses over his private area and we used to have that on the fridge."
However, while the Oscar-nominee admits the tale is partly true, he insists Barr played no part in his puerile prank.
He tells the New York Daily News, "I called it The Face. But I knew better than to do it at that stage of my career. I must have told her the story."