"Roy finds it necessary to pick the last little piece of lint off the carpet or wipe the tiniest smudge off a glass or he's not going to be able to sleep that night, and that's how he functions - barely," says Starkey. "He has a whole catalogue of nervous tics. It takes an actor with a certain sensibility to do more with these compulsive mannerisms than just play them for laughs. Nicolas Cage has the comic instinct for that, but it's the vulnerability he brings to the character that makes you really feel for him, and I believe that's critical to the role."

"Choosing Nic was a foregone conclusion," Scott states. "I've been aware of his work for years - left, right, center, he does it all. He's an amazingly versatile actor. He always brings so much dimension to his characters, such sympathy and pathos, and such strength."