Sienna Miller arrived at Heathrow airport in London with her many bags today. She's headed to the West Coast, where she'll meet up with Jude Law to host Friday night's Esquire House charity event at a Hollywood Hills mansion. Sienna has plenty of experience throwing a party, including a recent event for friend Matthew Williamson's book launch, where she wore a bold dress by the designer. Sienna's fashion choices were in the spotlight during the British Film Festival, and she kept the stylish outfits coming with her layered Fall airport look.


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