The Oscar winner, 65, says, 'holding your tummy in is another trick for making you look and feel good', adding, 'I don't know why, but I do, by nature, hold my tummy in.'
And even Mirren has her hang ups:
'Bits of my body are all right, but bits of me are horrible. To be honest, anything from the waist down I don't really like.'
But she has a trick for her legs, the now fashionable platform heel:
'Four-inch platforms give you great height and make your legs look unbelievably long. I used only to be able to get them in stripper shops, but now you can buy them everywhere - although, unfortunately, that means everyone else has discovered the trick too.'