Designers and sisters Savannah Miller (left) and Sienna Miller during a rehearsal for their Twenty8Twelve spring/summer London Fashion Week show, at the Old Sorting Office in central London Stock Photo - Alamy

She Is Inherently Golden”: Savannah Miller On Her Sister Sienna Miller's Style

Sienna and Savannah Miller design catwalk show - The San Diego Union-Tribune

Sienna and savannah miller hi-res stock photography and images - Alamy

Savannah miller and sienna miller hi-res stock photography and images - Alamy

Jude Law takes pride of place in front row as he supports Sienna Miller at London Fashion Week

Sienna Miller: Twenty8Twelve at London Fashion Week!: Photo 2239912, Savannah Miller, Sienna Miller Photos

Sienna Miller: Twenty8Twelve at London Fashion Week!: Photo 2239912, Savannah Miller, Sienna Miller Photos

Sienna and Savannah Miller design catwalk show - The San Diego Union-Tribune

Sienna Miller: Twenty8Twelve at London Fashion Week!: Photo 2239912, Savannah Miller, Sienna Miller Photos

Nervous Sienna Miller makes London Fashion Week debut as her THREE mums turn up for support

Sienna and Savannah Miller on Twenty8Twelve and sisters, British Vogue

Sienna and Savannah Miller design catwalk show - The San Diego Union-Tribune

Sienna Miller and Savannah Miller London Fashion Week Spring/Summer 2011 - Twenty8twelve Fashion Show-Backstage The Old Sorting Office London, England - 18.09.10 Stock Photo - Alamy

Savannah Miller - Wikipedia

Sienna Miller so excited about LFW, British Vogue