`` Lucy in the Sky with Diamonds '' is a song written primarily by John Lennon and credited to Lennon-McCartney , for the Beatles ' 1967 album Sgt. Pepper 's Lonely Hearts Club Band .
`` Lucy in the Sky with Diamonds '' is a song written by John Lennon and Paul McCartney for The Beatles ' 1967 album Sgt. Pepper 's Lonely Hearts Club Band .