Julian Lennon whose lyrics describe a picture the boy had drawn, a watercolor painting of his friend, Lucy O'Donnell, from nursery school surrounded by stars. Another composition of his father inspired by him was the lullaby "Good Night", the closing song of "The Beatles" (also known as The White Album). In 1967, he attended the set of the Beatles' film "Magical Mystery Tour". When Julian was five years old in 1968, his parents divorced following his father's infidelity with Japanese multimedia artist Yoko Ono. John Lennon married Ono on 20 March 1969, and Julian has a younger half-brother, Sean Lennon, and a
John Lennon derived from the initials LSD, Lennon insisted, "It's not an acid song." McCartney corroborated Lennon's explanation that Julian innocently came up with the name. Lennon was distant from Julian, who felt closer to McCartney than to his father. During a car journey to visit Cynthia and Julian during Lennon's divorce, McCartney composed a song, "Hey Jules", to comfort him. It would evolve into the Beatles song "Hey Jude". Lennon later said, "That's his best song. It started off as a song about my son Julian ... he turned it into 'Hey Jude'. I always thought it was about me and