The Godfather
The Godfather is chock-full of iconic lines but we want you to focus on this line: “Leave the gun— take the cannoli.” Man, that was a legendary one-liner if we have ever heard of one! True, the first bit was in the script, though Richard Castellano made it brilliant by tacking on the latter half.
Casablanca
Casablanca is a classic and we are all familiar with this famous line: “Here’s looking at you, kid.” While you can say it was improvised, the writers officially added it to the screenplay. They first came up with the idea when they heard Bogart Humphrey say it to Ingrid Bergman when the pair played poker during breaks.