Newly single Sienna puts on brave face as she attends Downing Street party

She's had a difficult couple of weeks.

But Sienna Miller put on a brave face, stepping out in style last night at Number 10 Downing Street for an official London Fashion Week reception.

Accompanied by sister and business partner Savannah, it was her first public appearance since her second break-up with Jude Law.

 

 

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The actress and designer was, perhaps, not looking her usual effervescent self,  but  sparkled nonetheless in a black minidress, presumably her own label, Twenty8 Twelve.

Other attendees included Kate Moss and Claudia Schiffer, looking elegant in a silk floral dress.

Meanwhile, Hollywood A-listers took their places alongside homegrown fashionistas at Burberry's Autumn/Winter 2011 show, the biggest of the London extravaganza.

 

 

Amongst Burberry's front-row beauties were fashion week favourite Alexa Chung and Hollywood stars Rachel Bilson and Kate Bosworth.

Also in attendance were Samantha Cameron, now an ambassador for the British Fashion Council, and Vogue editor Anna Wintour.

Models took to the longest catwalk in fashion week history in Burberry's trademark 'British heritage' macs and luxury outerwear accessorised with dalmation fur hats.

Simulated snow marked the end of the show, falling lightly on models wearing plastic see-thru raincoats.