Matt Damon & Michael Douglas -- We're Taking Over Casa von Ahole

Prince von Ahole is about to get some incredibly famous house guests -- TMZ has learned he's renting out his Bel Air mansion for a movie starring Matt Damon and Michael Douglas.

Sources close to the Prince tell us ... Ahole and his wife Zsa Zsa Gabor struck a deal with the people behind Steven Soderbergh's upcoming project, "Behind the Candelabra" ... an HBO film about Liberace.

The film stars Douglas and Damon -- and we're told producers plan on shooting inside von Ahole's pad for at least 23 days.

Sources tell us Prince will rake in somewhere in the ballpark of $70k from the deal ... which is HUUUUGE because Ahole needs the money.

We broke the story ... Prince took a $1.5 million personal loan to pay off his mortgage in the face of foreclosure ... but he only has 11 months to repay the loan.

$70k ain't a bad start ... only $1.43 million to go!