Apocalypse Now
Although Marlon Brando proved himself as one of the greatest actors ever, he was apparently a bit hard to work with on set. Thus, we have one of our more extreme examples of going off-script. Also, Brando famously used method acting and even adopted character quirks in his real life. While acting as Colonel Kurtz for Apocalypse Now, Brando simply refused to learn his character’s lines. Actually, he even jokingly put his script on his head as a paper hat. So by the end of the film, he had improvised close to 18 minutes of Colonel Kurtz’ dialogue.
Apocalypse Now
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