James Cosmo(I)

Although audiences are used to seeing him as a tough, imposing character actor, he is renowned for 'getting the giggles' on set after muddling dialogue. He has featured on several outtakes & bloopers shows in the UK, where he is seen blowing take after take, giggling uncontrollably - and infecting others on set - bringing the shoot to a laughter-filled halt.

I do still sit back and wonder when I'm in LA if this is all really true or is it all kid-on. But it's great. I always bear in mind that the right place and time have a huge deal to do with it, and there are hugely talented actors who haven't had that break.