Aug 20 - She was parodied in The Devil Wears Prada but now Anna Wintour is telling her own story in a new documentary.

The September Issue follows the American Vogue editor as she creates the magazine's biggest ever issue last year.

The movie premiered in New York with Sienna Miller who was on the cover of the magazine, Renee Zellwegger and Diddy on hand.

Cindy Martin reports.