Casting Net: Charlie Hunnam aiming to join Emma Stone in 'Crimson Peak.' Plus: Michael Gambon and Alfred Molina to play a couple

* Charlie Hunnam is in talks to topline Crimson Peak, director Guillermo del Toro's follow-up to his upcoming film with the Sons of Anarchy star, this summer's Pacific Rim. Emma Stone is also in talks to star in what's being described as a haunted house film, though plot details are being kept hush hush. Del Toro and Lucinda Coxon (Wild Target) are re-writing the script Del Toro wrote with Matthew Robbins (Mimic, Don't Be Afraid of the Dark). [Variety / Variety]

* Michael Gambon and Alfred Molina will star in Love is Strange, about a longstanding couple who suddenly have to live apart after they get married in New York City. Ira Sachs (Keeps the Lights On) will direct from a script he penned with Mauricio Zacharias (Keep the Lights On). [Deadline]

* Jeremy Piven, Ray Liotta, and Juno Temple have joined the expanding cast of Sin City: A Dame to Kill For, which includes returning actors Mickey Rourke, Jessica Alba, Rosario Dawson, Jamie King, and Michael Madsen, and newbies Joseph Gordon-Levitt, Josh Brolin, Dennis Haysbert, and Jamie Chung. As was the case with 2005's Sin City, Robert Rodriguez and Frank Miller are sharing directing and screenplay duties. [Deadline]