One scene that Hitchcock wanted in the movie was to be filmed at an auto assembly plant in Detroit. We'd see the assembly of a car from start to finish, and when it rolled off the line and the door was opened, a body would fall out. (Source)

Even after filming half the movie, Cary Grant still didn't understand the plot. Hitchcock kept it that way, since he thought it would give the actor the perpetual state of confusion that his character found himself in. (Source)

In 2006, Todd McEwen wrote an article in Granta titled "Cary Grant's Suit," which tells the story of NXNW from the perspective of the suit. We liked that suit, too, but seriously? (Source)

An epic movie, North by Northwest is also the subject of an epic study by Raymond Bellour, who set a new standard for close analysis of the film. (Source)