Sienna Miller opted for a very laid back look for the Sydney press conference for her new action movie “G.I. Joe The Rise Of The Cobra”.

The actress look radiant wearing a cute Axl print dress from the Poltock & Walsh Fall 2009 collection.

She wore her dress with a pair of suede/leather Chloé camel lace-up ankle boots.

Sienna kept her make-up fresh and light as her honey coloured hair shone in the glorious sunshine.

Only Sienna can wear something this casual and be considered for Best Dressed Of The Week.

Fiamma Poltock and Katie Walsh are London based designers, you can view their full Fall 2009 collection here. Apparently Kate Moss is also a huge fan of their work.

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Credit: Poltock & Walsh & Wireimage