Scarlett Johansson : the next iron man sequel heroin
She signed up the deal March 12 and has followed in the footsteps of actors Samuel L. Jackson and Mickey Rourke to come onboard for the 2010 project, reports contactmusic.com.
Johansson, 24, will play Marvel comics' villainous superspy Black Widow opposite Robert Downey Jr., Gwyneth Paltrow and Don Cheadle in the new movie.
