James McAvoy and Robin Wright Penn are set to star in the Robert Redford-directed The Conspirator, reports Variety.
The project, scheduled to start filming in October, is a period drama based on true events following the assassination of President Lincoln.
Wright Penn will play Mary Surratt, the only woman among a group charged with conspiring to kill the president. McAvoy will play Frederick Aiken, an idealistic young war hero who reluctantly defends Surratt and in the process comes to believe she is innocent.
James Solomon wrote the script.