10 Funniest Improv Scenes in Comedy Movies, Ranked

For many actors, the freedom to improvise can either be deathly paralyzing or so freeing that it causes them (and the production) to veer off-course. But when improvisation works, it can create a magical spark that mixes preparation with innate genius. These sparks can rarely be scripted and provide a jolt of authenticity to the other actors and the audience alike. From Robert DeNiro to Dustin Hoffman, some of cinema's greatest actors have provided excellent dramatic improvisations that have improved their films.