Jon Hamm Don Draper 'Mad Men' Banana Republic creative director Simon Kneen

Jon Hamm, who plays Don Draper on 'Mad Men' (left), with Banana Republic creative director Simon Kneen (right). Photo courtesy of AMC/Banana Republic

"Mad Men" is coming back and Banana Republic wants to help you get the show's '60s style.

For the second year in a row, Banana Republic is partnering with the iconic AMC show, promoting the series via its store windows, a how-to style guide, online instructional videos, and a contest in which one customer will win a walk-on role.

One week before the show's July 25 Season 4 premiere, the retailer will launch its Mad About Style campaign and style guide, which shows readers how to dress from 9 to 5 and then for dinner at 8. "Mad Men" characters will be featured alongside Banana Republic looks.

The show's costume designer, Janie Bryant, and Banana Republic creative director Simon Kneen will bring many of the style guide concepts to life with videos on AMC's Web site as well as Banana Republic's Facebook page.

The most important bit – entering to win a walk-on role -- is done by picking up a "ticket" at any Banana Republic in the U.S. and Canada between July 21 and Aug. 11. The ticket bears a code that allows customers to upload photos of themselves wearing their best "Mad Men" look. Series creator Matthew Weiner will select the winner.

Mad Men Banana Republic Mad About Skirts

Raise the martini glass: Banana Republic and "Mad Men" are collaborating again. Photo courtesy of AMC/Banana Republic

Good luck to all you skinny-suited Dons and pencil-skirted Joans out there. Now check out how different Betty Draper, played by January Jones, looks these days.