Directed by Joe Lynch, Everly focuses on a woman who has to ward off assassins hired by her mob boss ex, writes The Hollywood Reporter.
Lynch has apparently come up with the concept to shoot the film in just one room when production begins in May.
Everly will be produced by Crime Scene Pictures and Anonymous Content.
Crime scene partners Adam Ripp and Rob Paris said: "When we heard that Kate wanted to make the transition into an action star, we knew we had found our Everly. The physicality and intensity of this role will be transformative for her."
The Something Borrowed actress became a mother for the second time back in June after giving birth to a baby boy named Bingham 'Bing' Hawn.
Watch the trailer for Something Borrowed below: