Michael Fassbender fell asleep on set when he was an extra in 'Holby City'.
The 'X-Men: First Class' actor appeared as a guest star in the BBC One medical drama in 2002, but he disappointed the director by falling asleep in the middle of filming a scene.
I thought that was awful. The conveyor belt-ness of it was pretty soul destroying as it was, without hearing that from the director.
He told ShortList magazine: "They were taking my spleen out and I fell asleep. I was lying on that bed for six hours.
"I remember waking up mid-way through the take and the director saying to the cameraman, 'Oh, we'll have to get better guest actors in the next episode.'
"I thought that was awful. The conveyor belt-ness of it was pretty soul destroying as it was, without hearing that from the director."
However, by the time the 34-year-old hunk came to star in 'X-Men: First Class', he had developed a more "professional" attitude to his acting career, and was concerned co-star January Jones felt "uncomfortable" in the skimpy costumes she was required to wear in their scenes.
Michael recently said: "We were trying not to make an uncomfortable scenario for her - she was standing there in skimpy clothes and obviously there's a whole plethora of fans out there who get all excited about the prospect of that, so we were working with her as a professional."