When the Beatles saw an unfinished version of the cartoon, they were very pleased and impressed with it. They decided to appear in a , to finish the movie. "Yellow Submarine" made its public debut on June 6, 1968, and became an instant hit with audiences, especially with children and families. Most of the people who saw the movie did not know how little the Beatles had really been involved with making it, or even thought to ask. Many of their later memories of the Beatles were based on what they saw in "Yellow Submarine".