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

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, 41, looks radiant as she's spotted with model

Sienna Miller 'pregnant': 'Actress expecting first baby with

Sienna Miller Makes First Appearance Post-Baby at Chloé Show: See

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

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All About Sienna Miller's Daughter Marlowe (and Her Baby on the Way!)

The Non-Blonde: Sisters- Sienna and Savannah Miller

Sienna Miller wears pink slip dress to her baby shower in photos

Sienna Miller's sister Savannah surprises in sheer corset wedding

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