Julianne Moore was "scared" of working with Madonna.

The 54-year-old actress recalled: "I was super nervous. I was so, so nervous.

"I didn't actually make contact. It was a fake slap, but she wasn't talking to me because she was being kind of method-y doing her thing so I felt nervous and scared. I didn't want to hurt her at all."

However, Julianne admits Madonna's intimidating demeanour was confined to the film in which the singer's on-screen character, Rebecca Carlson, is suspected of having murdered her older lover for personal gain.

Julianne - who also starred alongside Willem Dafoe in the erotic thriller - told Bravo's 'Watch What Happens Live': "She was [a method actor at] that time, because she was playing the girlfriend and I was playing the wife. We were supposed to be enemies. She's always been very nice to me other times. This was just on this movie, so I was very scared of her."