Its bound to happen sooner or later I guess. Age before beauty: Actress Melanie Griffith shows off her baggy knees in Bermuda style shorts Premature signs of ageing: The 49-year old has been waging a battle against losing her good looks The 46-year-old Mask Of Zorro star has told of his wife in the past: "Hollywood stars are not supposed to be perfection. I don't believe in perfection. I think it is a mistake. "I said to her, I want to see you growing old and I will grow old with you too, and I don't care. I like her the way she is. Wrinkles are beautiful." Other stars, however, have done much to combat the problem of ageing knees. Actress Demi Moore, 44, reportedly had a £5,000 knee lift in 2004 because they looked so out of place with the rest of her toned body. And 39-year-old Nicole Kidman prompted speculation she had tried liposculpture when she was spotted sporting sticking plasters around her knees while on holiday a little over two years ago. After this treatment, a patient will wear plasters and support stockings while the skin recovers. Younger women are certainly not immune to the problem of sagging knees. Kate Moss, 33, is often pictured flaunting knees which seem to have bourne the brunt of her hard-partying lifestyle.