Share the secrets of young-at-heart celebs

Helen Mirren, 64, actress

The secret? Maintain a healthy attitude - but don‘t get obsessed.

That picture of Dame Helen in her red bikini saw younger women turn green with envy - but the actress insists it was just taken from a flattering angle. What's more, she doesn't stick religiously to a fitness regime. ‘I go through phases of exercising,' she admits. ‘If I start getting puffy when I go upstairs, I'll force myself back into minimalist exercise. I'm a great believer in the Canadian Air Force exercises because they only take 15 minutes.' And what about dieting? ‘I've gone through many diets that are also very boring,' she reveals. ‘You stop eating, and that's what makes you lose weight: not eating. But as you get older, losing weight doesn't make your body look better, don't you think?'

Try the eating and walking plan to find the right weight for you