Keira Knightley Stars in Sexy New Coco Mademoiselle Film

Mon Dieu! In September, we shared a sneak peek of Keira Knightley‘s new campaign for Chanel’s Coco Mademoiselle fragrance, and at long last, the full-length film is finally here.

In the sensual, three-minute spot (above), Knightley, playing a mysterious modern-day Coco Chanel, dons a skintight camel catsuit and matching helmet and hops a motorbike, riding through the streets of Paris as Joss Stone croons “It’s a Man’s Man’s World” in the background.

She arrives at a studio, where she goes behind the lens for a sexy photographer, posing for shots in an inviting bedroom set. She soon seduces her camera-wielding amour, but after asking him to lock the studio door, escapes out the window and mounts her motorbike, tucking a tiny bottle of Coco Mademoiselle fragrance into her suit.

The video — set to air in shorter form on cable television beginning Tuesday — is part of Knightley’s second Chanel campaign (her brand debut was in 2007). A series of corresponding print ads, shot by Mario Testino, will debut in April 2011.