Johansson Talking "Iron Man 2"

Scarlett Johansson may be the latest replacement in the second "Iron Man" film.

Emily Blunt was originally cast as Russian spy Natasha Romanoff but with her commitments to "Gulliver's Travels," Blunt may be unable to fill the role of Black Widow.

While Blunt's representatives are trying to figure a way to fit both movies into her schedule, producers are prepared to move on. According to EW.com, producers have started talking to alternative actresses to take the role, the list being topped by Scarlett Johansson.

While "Gulliver's Travels" already has a scheduled start date of April 15, "Iron Man 2" has neither a shooting script nor a start date.

This won't be the first star to have lost a role in the franchise. Late last year, Terrence Howard was dropped as 'War Machine' Jim Rhodes and replaced with Don Cheadle.