Kevin Spacey says films can "embrace the best of theatre".

The actor-and-director has worked on both movies and plays and believes they don't have to be that different.

He said: "I'm a big believer that film can not only be big and explosive, with lots of action, but can also have real power in claustrophobic settings. Go back and look at 'Twelve Angry Men', 'Dog Day Afternoon', 'The Social Network' last year was a movie about people sitting in rooms talking. Film can embrace the best of theatre, which is the actors' medium, and you put actors in a room, set a camera there, and you don't cut away every three seconds."

Kevin also revealed the reason he took on his latest role of banker Sam Rogers in 'Margin Call' was because he knew writer and director JC Chandler would make him human.

He told the Telegraph newspaper: "JC Chandor had an interesting way into a complex and confusing series of events. I realised that he was basing the character of Sam Rogers largely on his father, who had been in the banking industry for 40 years and was there when it all collapsed.

I felt he had a humanising approach, laying out decisions that were made and that people had to follow. I'm not saying we're trying to create sympathy [for bankers], but I think there's a valuable lesson in having empathy for people who are largely dehumanised. The collapse of the banks also affected the lives of people who were just trying to make a living. They got caught up in it all, perhaps made mistakes along the way. There were higher-ups who were warned repeatedly. But maybe not every one of those people was simply greedy."