Steven Tyler releases song from 'Sin City' soundtrack

LOS ANGELES, Aug. 21 (UPI) -- Aerosmith frontman Steven Tyler took to Twitter Tuesday to unveil a new song he recorded for the Sin City soundtrack.

"Skin City" is a collaboration between Tyler and the film's director, Robert Rodriguez. The 66-year-old rocker revealed the track by re-tweeting one of Rodriguez's posts with a link to the album's iTunes page.

In theaters Friday Sin City: A Dame to Kill For is the sequel to the 2005 film Sin City. Like its predecessor the sequel will center on the lives of several Sin City residents, including Jessica Alba's Nancy, Bruce Willis' Hartigan and Mickey Rourke's Marv.

Josh Brolin, Joseph Gordon-Levitt, Rosario Dawson and Eva Green also co-star on the film.