PHOTOS: Anna Wintour & Renée Zellweger Have an 'Issue'

Anna Wintour and Renee Zellweger"

You wouldn't guess by looking at her, but Renée Zellweger actually enjoyed herself at last night's premiere of The September Issue, a new documentary that follows Vogue editor Anna Wintour as she strives to put together the mag's huge fall fashion issue. A horde of fashion-friendly celebs, including Sienna Miller and Diddy came out for the event.

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