Simon Pegg likes working on a happy set.

The A Fantastic Fear of Everything actor says he's learned over the years not to be a diva when it comes to work because it ruins the atmosphere for everyone else involved.

"It probably occurs with actors a little less. It's something that is expected of musicians, you know, the TV out of the window. With actors it manifests itself as disappearing into the trailer for hours at a time. I'm 42 now, I'm not some youngster believing my own hype, and I always enjoy working on a set where everyone's happy. I couldn't walk on set two hours late having refused to come out of my trailer, and feel the grips looking at me thinking: 'Who's that arsehole?' I'm not OK with that, but I can see how it happens," Simon said, speaking of outrageous behavior.