The actress is stepping behind the camera for a movie adaptation of Truman Capote's Summer Crossing, which was thought to be lost for more than 50 years but was eventually published in 2005.
Johansson has teamed up with screenwriter Tristine Skyler for the project, but has no plans to star in the film about a teenage girl living in New York after World War II.
She tells NYmag.com, "It's a project I've been developing for five or six years. I'm writing it right now with Tristine Skyler, so we'll see. You have a script and then you take it out and finance it. It's a big preproduction process, but that's where my focus is."