With outfits like that, this pair of famous sisters wouldn't look out of place on the catwalk with the rest of the models at London Fashion Week.

Both wearing lace-inspired designs, Pixie and Peaches Geldof stepped out together for the start of the six-day-long event.

Perhaps Pixie, who turns 18 on Wednesday, will be looking for some inspiration for her birthday outfit.

Sisters together: Pixie and Peaches look stunning at London Fashion Week

The pair sat front row during the PPQ show, which showcased its latest cutting edge designs at the opening of London Fashion Week on Sunday.

Headed by Amy Molyneaux and Percy Parker who list the letter 'P' as among their inspirations, PPQ combined a space-age collection including jumpsuits with a humorous take on 1940s-style hats.

The designs had a ring of air stewardess' uniform with belted waists played alongside quirky oversized t-shirts worn as dresses.

Pixie and Peaches got a good view front row at the event

The sisters happily posed for photographs during their outing and looked stunning with their opposing blonde and dark hair styles.

Pixie in particular turned heads with her new 'pixie' haircut which bared similarities to Victoria Beckham's new chop which she unveiled last week at New York Fashion Week.

And dad Bob is probably hoping younger sister Pixie will make sure Peaches, 19, stays on her best behaviour.

Socialite Peaches hit the headlines last month after getting hitched to 23-year-old Max Drummey - the drummer of rock band Chester French - in a quickie ceremony in Las Vegas.

Sir Bob was said to be 'furious' about the wedding.

A model sports a PPQ design, above, and below Top Shop's Spring/ Summer 2008