Madonna has teased fans with a promo clip for her new project with photographer Steven Klein.

The singer has been promoting the unknown collaboration on Instagram recently but little information has emerged about the 'Secret Project'.

A trailer has now been uploaded online that shows a tense looking eyeball twitching and looking around.

The dark clip comes in at almost a minute long but it fails to reveal any more details about the secretive project.

Madonna meanwhile previously uploaded a photo of herself behind bars, along with the caption:

"#secret project. I want to start a revolution! Are you with me?"

Klein has previously worked with the Queen of Pop on numerous tour visuals, as well as on the likes of Rihanna's Armani jeans adverting campaign.