Hollywood siren Jessica Alba says she will never appear nude in front of cameras.

The 26-year-old 'Into The Blue' actress, who caught everyone's eye with her role as a stripper in the hit film 'Sin City', has vowed not to do steamy scenes for films, world entertainment news network reported.

She says: 'I'm attracted to roles that are more innocent. I haven't done a sex scene and I've never done nudity.'