Harry Potter and the Chamber of Secrets
In this movie Harry Potter and the Chamber of Secrets, we see the boys taking a joy ride in the enchanted car. This results to Molly and Arthur Weasley arguing about how to discipline them. One of the improvised lines that made it to the final cut came from Mark Williams. It was the question, “What exactly is the function of a rubber duck?”

Harry Potter And The Chamber Of Secrets
Ghostbusters
Rick Moranis, who began his career at the popular improve group, made up a lot of lines for his role in Ghostbuster which was directed by Ivan Reitman. The director told Rolling Stone that Rick was a natural since he came up with a lot of ideas, including the speech at the party. “Rick just made all of it up as he was doing it,” he remarked.

Ghostbusters