(Cover) - EN Showbiz - Oscar Isaac says Madonna would have "gotten the fire hose out" if any of the cast were "divas" on set of W.E.

The actor stars in the superstar's second directorial offering which details the controversial love affair between American divorcee Wallis Simpson and King Edward VIII.

Oscar says Madonna was a no-nonsense director.

"Oh God, gotten the fire hose out!" he laughed when asked what she would have done if any of the cast were acting like divas.

Oscar has revealed what it was like to work with Madonna. The 32-year-old star says she was focused, but also very down-to-earth.

"It was very intense. She's a very demanding director but I work well under that kind of pressure. It was refreshing working with her because a lot of people will just settle for mediocrity but she made sure she got the best out of everyone," he explained in an interview with the British edition of OK! magazine.

"She would spontaneously burst into song and we'd join in. We were a very musical group of people so it did work. We were quite goofy! She'd also tell lots of really bad jokes." (C) Cover Media