British comedian Rowan Atkinson claims to laugh out loud an average of once every five years.
The Mr Bean star also admits he feels no enjoyment from hearing an audience laugh at his jokes.
He says, "Some actors get an incredible high from hearing laughter, but I don't. Sadly, I never feel any great adrenaline rush. I never get elated by it, I never feel any euphoria.
"All I get is relief. That it worked, and that it has gone down well and the job is being done. So I feel satisfaction rather than an elation.
"I don't laugh very much at all. I smile and I am enjoying myself but I don't laugh out loud, hardly ever - maybe once every five years."