Actress Jessica Chastain is in talks to join the Marvel Studios superhero sequel Iron Man 3. She was originally offered the role, although it looked like she would have to turn it down due to scheduling conflicts. Now all of her previous conflicts have been ironed out, and she is in negotiations.

The actress will portray a "sexy scientist" in this sequel, one that is said to be just as intelligent as Tony Stark (Robert Downey Jr.). We /guy-pearce-joins-iron-man-3-as-aldrich-killian/reported last week that Guy Pearce is in talks to play Extremis creator Aldrich Killian, so it is possible that her character may be connected to him somehow.

Shane Black is directing from a screenplay which he co-wrote with Drew Pearce. Production is scheduled to begin next month in North Carolina. Marvel Studios has already handed out a May 3, 2013 release date.

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