Alba told Vulture that she "had to learn a bunch of dance sequences for it. I do a lot more dancing in this one." She added that she needed three months to prepare for the part. "It was kind of crazy. It was very, very difficult, and you'll see why."
Sin City: A Dame to Kill For is currently in the works for an October 4 release. The Robert Rodriguez and Frank Miller film also stars Mickey Rourke, Joseph Gordon-Levitt, Josh Brolin, Rosario Dawson, Jaime King, Dennis Haysbert, Jamie Chung, Chris Meloni, Ray Liotta, Juno Temple, Jeremy Piven and Bruce Willis.
You can check out Alba's dance sequence from the first film using the player below: