Speaking at the movie's London Film Festival press conference, Anderson confessed that he decided to cast George Clooney in the part when he realised he was the modern-day equivalent of the debonair North By Northwest star.
"Sometimes when I've been writing a script I've had an actor in mind," said Anderson. "In this one we were just thinking of animals until the script was done. As soon as it was done we thought, 'Well, who's going to be Mr Fox?' I thought Cary Grant would have been good. Within 20 seconds of thinking of Cary Grant we were talking about George Clooney."
Clooney mimed Grant turning in his grave at the idea of the two being compared.
> Watch the new Fantastic Mr Fox trailer here