"Die Hard" celebrated its 35th anniversary this month. Since its release, behind-the-scenes secrets about the film have emerged over the years.
The 1998 action film helped boost Bruce Willis' career, but the 68-year-old actor was reportedly the last choice for the starring role.
Arnold Schwarzenegger gave Willis a piece of advice after the actor decided to venture into Schwarzenegger's territory of action films.
And an off-camera joke Willis cracked ultimately made its way to the final cut of the film and is now considered one of the most famous lines from the '80s movie.
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