According to Latino Review, a casting call for the movie lists Johansson as a confirmed castmember as her character Black Widow/Natasha Romanoff, who was an assistant to Tony Stark (Robert Downey Jr) in Iron Man 2.
© Rex Features / c.Paramount/Everett/Rex Features
Johansson, who will be portraying Black Widow in the upcoming Avengers film, previously said that she would like to see a "gritty" movie about the comic book heroine.
"I love playing the Widow," she shared. "I think she's got a very interesting past, a lot of storylines to explore, and certainly [producer] Kevin [Feige] loves that character."
Last month, Marvel Comics announced three-issue miniseries The Avengers: Black Widow Strikes, based on the actress's version of Black Widow.
The Avengers will open to cinemas on April 26 in the UK and May 4 in the US, while Iron Man 3 is set for a May 3, 2013 release.
Watch the trailer for The Avengers below:
