Pride & Prejudice/Atonement director Joe Wright’s new spot for Chanel’s Coco Mademoiselle stars Keira Knightley as a sultry biker babe in what might just be her best role to date. Good timing as Wright is set to release his first action pic Hanna due out next month. Gotta love what Chanel is doing putting together big stars and big directors in their commercials. Hey if you’ve got the budget…