January Jones models Grace Kelly style.

Photo: Todd Marshard

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It's in the Details
A comfortingly slouchy "boyfriend" sweater (Gap, $68) thrown over the shoulders is a chic way to relax between takes. The straight silk skirt (Paul Smith, $965) features a hint of black lace at the hem—a tongue-in-cheek detail that makes it look as if her slip is showing. A bolder, less-repressed take on the '60s is on view in January's new movie, The Boat That Rocked. A comedy, out next year, it's about a pirate radio station off the English coast. (It co-stars Philip Seymour Hoffman and Kenneth Branagh.)

Turtleneck, Gap, $42. Brooch, Carolee Lux. Watch, David Yurman. Rings, Diamonair.