Friends and fellow filmmakers Brian De Palma and George Lucas were both casting for new films at the same time—De Palma for Carrie, Lucas for Star Wars—so they decided to streamline the process and turn it into a collaborative affair. Actors wanting to audition for either movie were in reality reading for both films, after which the directors would discuss whether Carrie or Star Wars was a better fit. A quick YouTube search will find Amy Irving’s audition for Princess Leia.