Saoirse Ronan has said Ryan Gosling's directorial debut is going to be "very experimental".
The Lovely Bones actress has been cast alongside Christina Hendricks, Ben Mendelsohn, Eva Mendes and Doctor Who star Matt Smith in Ryan's new film How To Catch A Monster, which he has described as "a modern day fairytale, with elements of fantasy noir, horror and suspense".
Saoirse told The Hollywood Reporter: "I think it's going to be very experimental.
"I think Ryan is going to be very supportive as a director, just because he's an actor as well and he gets it. From what he's been telling me about the approach he wants to take, he wants us to really discover these characters ourselves and use our imaginations to create these characters."
She said: "He's already written great characters on the page, but he wants us to develop those even more as people. I like that he's put so much trust in his actors to do that. I think it'll be really fun and really cool."
The Irish actress revealed rehearsals begin in the next "month-and-a-half or two months" and filming will begin in May.
The surreal film is set in a vanishing city, where a single mother is swept into a macabre and dark fantasy underworld, while her teenage son discovers a secret road leading to an underwater town.