It's been almost two years since Charlie Hunnam dropped out of Fifty Shades of Grey, the eagerly-anticipated E.L. James film adaptation that might have catapulted the Sons of Anarchy actor into box-office-crushing, franchise-fronting super stardom. Hunnam explains that it wasn't the film?s sexual content or the kinky hang-ups of character Christian Grey that drove him away from the project as much it was a promise he had made to a friend?filmmaker Guillermo del Toro.