Saoirse Ronan (“The Lovely Bones”, “Hanna”) has been cast in Ryan Gosling’s directorial debut “How to Catch a Monster”, says Deadline.

Christina Hendricks, Matt Smith, Eva Mendes and – as Moviehole reported first – Ben Mendelsohn are also onboard.

The Gosling-penned script “is set against the dreamscape of a vanishing city where Hendricks’ character gets swept into a macabre fantasy underworld while her teenage son discovers a secret road leading to an underwater town.”