Dave Franco has been cast in The Intern's Handbook.

The Bad Neighbours actor will star in the adaptation of Shane Kuhn's new novel, which is centred around a placement agency that hire a network of assassins to take down high-profile targets.

Franco is set to play the lead role as the agency's top agent John Lago - a hitman who comes up against an FBI agent with the same mark, while disguised as an intern in a Manhattan law firm.

21 Jump Street producers Neal Moritz and Ori Marmur are involved in the films as well as Circle of Confusion's Brad Mendelsohn and David Alpert.

The 28-year-old actor will reprise his role as Eric Molson in the upcoming 22 Jump Street.

Watch the trailer for the video below.