Tootsie
With Dustin Hoffman and Bill Murray in a single movie, this movie was guaranteed to be a success. Murray played the supporting character of the roommate named Jeff. The director knew about Murray’s improvisation talent so he was allowed to come up with a monologue for the party scene. It goes without saying that it was amazing—it’s Bill Murray, after all.
The Third Man
Orson Welles is an excellent artist, but you might not know how much improvisation he does. In The Third Man, he came up with this unforgettable line: “In Italy for 30 years under the Borgias, they had warfare, terror, murder, bloodshed. They produced Michelangelo, Leonardo da Vinci, and the Renaissance. In Switzerland, they had brotherly love, five hundred years of democracy and peace. And what did they produce? The cuckoo clock.”