When the producers approached the Beatles about this film, the group, which hated the TV cartoon show of them, agreed to it only as a easy way of completing their movie contract. As such, they contributed only a few old songs and four quickly produced numbers, Only a Northern Song, Hey Bulldog, All Together Now, and It's All Too Much. However, when they saw the finished film, they were so impressed by it that they decided to appear in a short live action epilogue to the film.
"Women are like elephants to me; they're nice to look at but I wouldn't want to own one."
- W. C. Fields