Ralph Lauren are the outfitters for the 2011 Wimbledon Championship, so they celebrated with a party at the Ralph Lauren store on Brompton Road in London tonight.

Sienna Miller attended wearing a Ralph Lauren Spring 2011 look.

Her lace ivory dress was tragically accessorized with black boots and a black shoulder bag.

I also have issues with her straggly hair.

Why wear something so delicate and beautiful, if your plan is to make it look so grungy and unappealing?

What a waste of a perfectly good dress.

Credit: Style.com & Getty