Elle Macpherson's wrinkly knees give away her 44 years

Few would disagree Australian supermodel Elle Macpherson looks amazingly youthful at the age of 44.

Despite appearing to defy the ageing process, eagle-eyed fans can spot some evidence of her middle-age thanks to her wrinkly knees.

The tanned beauty turned heads in a little black dress with a staggered hem and peep toe heels in London last night.

Legging it: Elle Macpherson flashes her pins in a staggered black gown at the 30 Days Of Fashion gala at the Natural History Museum in London last night

Showing her age: On closer inspection, Elle's wrinkly knees are clear to see

Despite her sleek appearance, her short hemline could not disguise the saggy skin above her knees.

While Elle is in remarkably good shape after two children, her wrinkly knees are a difficult to disguise sign of ageing and sun damage.

Having grown up in Australia and regularly enjoying sunbed sessions, it's perhaps no surprise Elle has succumbed to the dreaded wrinkles.

Elle was one of the A-list guests at the 30 Days Of Fashion event at the Natural History Museum as part of London Fashion Week.

She joined Kate Hudson, Lulu, Gwyneth Paltrow, Sir Paul McCartney and Stella McCartney at the exhibition of Mary McCartney's photographs.

Looking good: Elle strikes a pose as she arrives at the Natural History Museum for the bash