Ad libbing has been around for quite a while! For this list, well be looking at the best ad libs and improvisational moments from cinematic classics. Our countdown includes moments from Roman Holiday, Pretty Woman, Taxi Driver and more! Which one of these unscripted moments took you by surprise? Be sure to share with us in the comments!

Check out these other unscripted-themed videos:
Top 20 Unscripted Animated Moments That Were Left in the Movie: https://youtu.be/eUM88uQAoH4
Top 10 Unscripted Moments That Were Kept in Teen Movies: https://youtu.be/qi7YvdG99EA
Top 10 Unscripted Christmas Movie Moments That Were Left In: https://youtu.be/D7QbOwxUdCA

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