Making a good movie has no formula: Paul Bettany

London: Actor Paul Bettany believes there is no specific formula for making a successful movie.

The 40-year-old, who has starred in films including ‘A Beautiful Mind’, ‘The Secret Lives of Bees’ and ‘Iron Man’, believes there is no guaranteed way to make a successful film. He says many people were surprised at the success of his latest work ‘Margin Call’. "I`ve never seen more shocked faces. Because nobody could quite believe it had come together so well," a website has quoted Bettany as saying. "I thought it was bright and well-written, which is rare, and it was 17 days of filming so I just thought, `This is a good punt.` It`s just proof that you never know. People are always trying to work out the formula for making a movie that is well-regarded, but it`s like looking at tea leaves," he said. The actor stars alongside Demi Moore, Zachary Quinto and Kevin Spacey in ‘Margin Call’. IANS