Casablanca – “Here’s Looking at You Kid”
I had no idea about this one. Probably the most famous line in movie history and it wasn’t even written for the film. Wow.
The Shining – “Here’s Johnny!”
I could so see Nicholson doing this on his own. And of course he did. Definitely the most popular line in the film.
Taxi Driver – “You Talking to Me?”
This was the first of a string of times when Robert Da Niro would repeat the same line over and over again. His other most memorable time doing this was in Goodfellas when he says “what did I tell you?”
Silence of the Lambs – “Shhhhhhhhh”
Remember that whole fava beans speech given by Lecter? That scary little shooshing sound he makes? Hopkins felt an impulse to make it. Nicely done.
*Not one line but almost the entire dialogue of the drill sargeant in Full Metal Jacket was apparently improvised. I find that unbelievable.