Taxi Driver
You’d be surprised to hear that the most popular line on TV “You talkin’ to me?” is not included in the original script for the film Taxi Driver. Scorsese gave De Niro the freedom to improvise. It’s a good thing the director did that because we just can’t imagine the film without that line in it!
The Warriors
The most unforgettable line in the movie The Warriors might be “Warriors, come out to play!” but this line was completely improvised by David Patrick Kelly. The actor is not just good at acting, but he is also good at improvising lines.