Colin Firth photographed every bruise he got while filming 'Kingsman: The Secret Service' because he was "so proud" of them.

He said: "It had to be me and not cheat and cut to a stunt man. It was one camera. The cameraman had to be choreographed as well.

"We had loads [of injuries]. But I'm so proud of them - they're trophies!

"Because there was always this doubt that anybody was going to believe that I was doing it if anyone got a bruise, or certainly if I got a bruise, it was photographed.

"It wasn't, 'Get the nurse,' it was, 'Get the camera.' Show the bruise or the broken tooth.

"We were all absolutely delighted we had something to show for it. It's pathetic. Macho."

While Colin - who is known for his romantic lead roles in films such as 'Pride and Prejudice' - found it tough to train for the motion picture, he is "craving" another action role.

Speaking on ITV's 'Lorraine', he added: "One is always conflicted about anything that feels a bit too much like hard work. It was very, very painful doing the training for it.

"But it was one of the most exhilarating things I've ever done and I missed it when it was over. I crave to do it again.

"But if somebody said I start next week then I'd have to battle that instinct to sit on the sofa staring into space and haul myself into it again.

"If it was decent stuff then I'd do it again."