who wrote hey jude

"Hey Jude" was written by Paul McCartney, with input from John Lennon. Paul McCartney originally wrote the song to comfort John Lennon's son, Julian Lennon, during the difficult time of his parents' divorce. The song began as "Hey Jules" but was changed to "Hey Jude" for better musical flow. It is credited to the Lennon–McCartney partnership and is one of the Beatles' most famous and enduring songs.