Movies
Peter Brooker / Rex Features
According to Variety, the actress has been tipped to star as The Black Widow, a Soviet superspy who wears a skin-tight black suit enhanced by high-tech weaponry.
The Marvel Comics character first appeared as a villain, hired to seduce Tony Stark and kill his alter-ego, Iron Man.
Filming for Iron Man 2 is scheduled to begin later this year, with a slated summer 2010 release date.
Original cast members Robert Downey Jr. and Gwyneth Paltrow have been confirmed to return, while Sam Rockwell and Mickey Rourke are in negotiations to play the movie's main villains.
Blunt previously appeared in The Devil Wears Prada and Charlie Wilson's War.
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