Nakatomi Plaza, the setting of the film, is actually Fox Headquarters in Los Angeles.

The film was originally planned as a vehicle for Arnold Schwarzenegger and a sequel to Commando, but Arnie declined.

Bruce Willis was only fifth choice for the role of John McClane. The others were, in order: Arnold Schwarzenegger, Sylvester Stallone, Burt Reynolds, and Richard Gere.

Regarding a previous Trivia entry: in the German version, ALL German terrorists received Anglicized names, and their background was altered as well. This was due to terrorist activities in Germany - the kidnapping of an airplane in Landshut (1977) and the activities of the Rote-Armee-Fraktion ('Red Army Fraction') in the Seventies -; the German producers evidently felt uncomfortable about the idea of having German terrorists appear in foreign movies also.

One cop says that John McClane (Bruce Willis) "could be a f***ing bartender for all we know". Prior to becoming a well-known actor, Willis was a bartender.

The teddy bear that Bruce Willis brings to his son is the same bear Alec Baldwin brings home to his daughter at the end of "The Hunt for Red October," which is another John McTiernan film.

When Bruce Willis (well, the stuntman) misses one of the vents in the elevator shaft, this was unintentional. John McTiernan left it in to give viewers a little scare.

During filming, Alan Rickman was found proficient at mimicking American accents; the scene in which McClane and Hans Gruber meet was then inserted.

Die Hard and Die Hard 2 are based on books by separate authors, "Nothing Lasts Forever" by Roderick Thorp and "58 Minutes" by Walter Wager, which share none of the same characters. In both books, it is the hero's daughter that is in peril rather than his wife, and the hero is also more trusted by the authorities than McClane. (In "Nothing Lasts Forever," he tosses his wallet out the window so the police on the ground know he's a cop.).

For the shot where Hans Gruber falls from the top of the building, Alan Rickman was dropped by a stuntman from a 20-foot high model onto an air bag. To get the right reaction, the stunt man dropped Rickman on the count of two instead of three.

At the end, Karl emerges from the building and tries to kill McClane, only to be gunned down by Powell. The triumphant music which swells as Powell shoots him is from the "Aliens" score--it plays at the end of that movie when Bishop reappears in the dropship to save Ripley and Newt, after they think he's abandoned them.

The terrorists show up at Nakatomi Plaza in a truck marked "Pacific Courier" (except Karl and Theo, who arrive by car). This fictional company name also appears on the side of the plane the bus crashes into at the end of "Speed." Jan de Bont, who directed "Speed," was DP on "Die Hard."