Jessica Alba told the crowd at Comic-Con that she got in touch with the dark side for her return to "Sin City."
The "Fantastic Four" and "Dark Angel" star is reprising her role as exotic dancer and revenge seeker Nancy Callahan in "Sin City: A Dame to Kill For," a prequel to the 2005 graphic novel adaptation "Sin City."
"I just really connected with the dark side of Nancy," Alba told fans Saturday at the pop-culture convention. "It was hard to detach from that until the movie was over."
Frank Miller, the film's co-director and graphic novel creator, didn't initially understand the effect that returning to the role had on Alba's personality.
"I haven't seen her in eight years, how did I piss her off?" joked Miller.
Alba said she worked with an acting coach and choreographer before production, which was a special-effects-laden endeavor mostly shot in front of green screens.
"The second time, I felt comfortable. I felt like a woman," Alba said.
Alba was joined at the San Diego Convention Center panel with "Sin City" co-stars Josh Brolin and Rosario Dawson, as well as co-directors Miller and Robert Rodriguez.