Matt Damon and Michael Douglas are reportedly convinced their new movie set is haunted.

The two stars have been shooting Behind the Candelabra, which is about the life of famed pianist Liberace.

They have become convinced there is other-worldly activity on set, with both of them concerned a male spirit has been watching them work.

"The movie centres around Liberace's last years with his young bodyguard/live-in lover, Scott Thorson, and several times during filming, Damon and Douglas turned to each other after a scene and said, Did you feel that?'" a source told National Enquirer.

"They swear they've felt cold damp air swish by, reeking of a potent men's cologne."

Michael portrays Liberace in the release, while Matt is Scott.

The older actor spent a lot of time behind the piano while shooting scenes for the TV movie, which is when he felt the presence at its most intense.

"He actually felt someone caress his shoulder," the insider said. "He whipped around but no one was there! Not only that, but on several occasions prop lights flickered uncontrollably."