Emily Mortimer has revealed that Michael Caine is a 'giggler' who makes filming scenes with difficult.
The actress stars alongside the veteran actor in British crime movie Harry Brown and admits that she struggled to keep her laughter under control when filming scenes with him.
Speaking to ContactMusic the actress said: "He's got a twinkle in his eye and he's a terrible giggler which is fatal for me.
"The minute that I can tell that someone has the propensity to crack up it's impossible for me not to. So we had a bit of a difficult time.
"I have this thing in the movie where I get whiplash and I was told by some stunt guy that it was very important that I held my neck at all times.
"I kept thinking about it and had my hand glued to my neck the entire time and Michael just couldn't stop ripping me about it.
"We got in this running joke about this thing and then of course whenever it came to the point where I actually had to do a scene with him with my hand on my neck and I can just see this little glimmer in his eye.
"We both just cracked up and ended up having to do it over and over again. We couldn't get through it."
Despite the jokes shared by the pair on set Mortimer had nothing but the highest praise for Caine calling him 'incredibly professional'
"He's just the most expert professional dude I've ever really worked with, I think, but he's been in it for such a long time and so he knows what he's doing.
"He comes, turns up and is completely prepared. He delivers an amazing performance and there's no nonsense, no complaining or high maintenance silliness going on. He's just incredibly professional and easy going and cool. I loved him."
Mortimer was last seen in the critically acclaimed Shutter Island alongside Leonardo DiCaprio and will be back on the big screen later this year in Japanese movie Leonie.
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