Sienna Miller was bursting with colour when she attended the autumn dinner and All Saints party at Petersham Nurseries in Richmond, England last night.

The event was in aid of Too Many Women, supporting Breakthrough Breast Cancer.

The British actress wore a Matthew Williamson Spring 2012 dress.

Sienna is to Matthew Williamson as Renee Zellweger is to Carolina Herrera: devoted, loyal and usually the first to wear a look from the latest collection.

Her coral sequin-embellished and feathered confection was accessorized with a metallic box clutch and subtle suede Charlotte Olympia platform pumps.

This is one occasion where fancy shoes weren’t needed because it’s all about the dress.

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