Penn 'stubbed out cigarettes on his leg'

Gary Oldman has revealed that Sean Penn used to extinguish cigarettes on his leg.

In an interview with Metro, Oldman claimed that his State Of Grace co-star picked up the habit to help him concentrate during takes.

"There was one actor I worked with who used to burn his leg with cigarettes," he said. "Let's just call him Sean Penn."

Oldman also admitted that he and Aaron Eckhart struggled to stop themselves from laughing when working on superhero sequel The Dark Knight.

He said: "It got to the point where I'd arrive on set, walk up to Aaron Eckhart to say 'Good morning' and he'd say 'Get away from me' and start laughing. I hadn't done anything.

"He'd say: 'Stop that.' I’d go: 'Stop what?' It was a great set but sometimes we had to pull ourselves together."