Ben Stiller is one of those performers who’s created such a recognisable niche in comedy that he’s almost become a genre in and of himself.

If you go and see a Ben Stiller film, you pretty much know what you’re going to get. That’s not a criticism – Stiller is an able performer, and frequently very funny. With The Secret Life of Walter Mitty, however, Stiller defies expectations and proves that he has far more strings to his bow.