Sienna Miller's sister Savannah, 42, announces engagement to wealthy aristocrat Jim Whewell

The fashion designer, 42, shared sweet photo to Instagram with her fiancé - who is heir to the 800-acre Wyresdale Park Estate in Lancaster.

Sienna Miller's sister Savannah reveals she's going 'full on' for

Savannah Miller's Instagram, Twitter & Facebook on IDCrawl

Sienna Miller's fashion designer sister Savannah, 43, marries

Sienna Miller's sister Savannah, 42, announces engagement to

Savannah Miller's Instagram, Twitter & Facebook on IDCrawl

Sienna Miller's sister Savannah surprises in sheer corset wedding

Sienna Miller's sister Savannah, 42, announces engagement to

Sienna Miller's fashion designer sister Savannah, 43, marries

Sienna Miller's fashion designer sister Savannah weds in dress of her own design - OK! Magazine

Sienna Miller's fashion designer sister Savannah, 43, marries

Nick Skinner's Instagram, Twitter & Facebook on IDCrawl

Sienna Miller - Latest News and Updates on the British-American

Sienna Miller's fashion designer sister Savannah weds in dress of