Rivers, 75, will open "Joan Rivers: A Work in Progress by a Life in Progress" at the Underbelly's Cow Barn, The Scotsman reported Friday.
"You better bring out all your cheap, tacky Scottish stuff when I come over, because me and my friends just love that stuff and we're gonna buy it all in spades," the newspaper quoted Rivers as saying. "I just love Edinburgh, there's something magical about the place and I can't wait to see it again."
The show opens Aug. 7, then is to transfer to London's West End before heading to Broadway next year, The Scotsman said.
"The festival's just great because you can be walking down the street and see mime artists -- which I absolutely despise by the way -- performing next to Shakespeare plays and it all seems to fit together," Rivers observed. "I love all these quirky shows they put on, they're right up my street. I once saw 'Hamlet' in Polish and a lesbian production of Shakespeare called 'Queen Leer.'"