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Dame Helen Mirren says starring in a comedy was "exhausting".
The Oscar-winning actress plays nanny Hobson in Arthur - her first big comedy - opposite Russell Brand, in the remake directed by Jason Winer.
Asked whether she'd like to appear in more comedies, she said: "That would be great way to go into my twilight years, laughing my way to the grave!"
Dame Helen, who usually picks period pieces, said: "The gap in my career as an actress was very much the big comedy film, which is what this (Arthur) is".
"I'd always been curious about how they make these movies - do they laugh all the time? I'm at the bottom of that game, so I was in a learning curve and it was good to have that experience."
But the Queen star added it was young work, saying: "I think it's a young person's game because it's exhausting. Your energy has to be up all the time. We did 15 hour days every day, so your whole body is constantly moving around."
:: Arthur opens in cinemas on Friday, April 22
