The Warriors
Naturally, watching David Patrick Kelly play Luther was one of the highlights of The Warriors. Anyone thinking of the line, “Warriors, come out to play!” you’re exactly correct. Never part of the script. Kelly not only invented that line but repeated it again when he decided to claw three bottles in his hand. Clearly, the director had to keep that in the final cut!

The Warriors
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