Andy Serkis gets "pretty sweaty" working in motion capture suits.
The 'Dawn of the Planet of the Apes' star finds it "liberating" taking on digitally-enhanced roles because he can be "anything", but admits there are some downsides.
He said: "After a few hours in the suit it gets pretty sweaty so no one really wants to be standing next to me.
"Seriously though, it's liberating and I love it as a way of working because it allows you to play literally anything.
"And it does require huge cajones to get up and do it actually because on a digital set you have to do a lot of your work internally and use your imagination."
Andy spent a lot of time studying gorillas and apes for his work in the 'Planet of the Apes' movies and had a scary encounter with one primate.
Dawn Of Planet Of The ApesHe recalled to Loaded magazine: "When I was working at London Zoo there were four gorillas.
"The male was called Bobby and he didn't like me very much because I'd formed a relationship with one of the female gorillas. I've actually got this moment on camera where he's eyeballing me in a threatening way.
"He's engaging me and looking straight into my eyes while gathering a pile of stones together... And suddenly he threw handfuls of them right into the lens of my camera."
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