Ben Affleck is set to star in the thriller Boston Strangler.
The actor-director, who pitched the film to Warner Bros, will also executive produce the movie, Deadline reported.
The film centres around the search for the murderer who terrorised the Boston area in the 1960s with a spate of killings.
Doubts have since lingered about whether the man who confessed really was the murderer.
Deadline says Argo star and director Ben hopes to play one of the detectives who were part of the Strangler Squad responsible for solving the crime.
The script will be written by Chuck Maclean.