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How Jessica Alba Got In Shape for the New Sin City Movie

Nancy Callahan will be fiercer than ever, thanks to this dance instructor.

In order to get in shape for the reprisal of her role as Nancy Callahan in Sin City sequel A Dame To Kill For, Jessica Alba enlisted the help of a dance instructor with some pretty intense workouts.

Jennifer “JJ” Johnson, who also choreographed the dance sequences in the movie, would get together with Alba for sessions that ran 2-5 hours at a time and, according to the instructor, included “crawling, arching, humping … winding, grinding and moving.”

Sin City: A Dame to Kill For is set for release on August, 2014.

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