Paul McCartney - i've just seen a face live, 2005

"Although the song is credited to the Lennon–McCartney songwriting partnership, John Lennon and Paul McCartney each identified "I've Just Seen a Face" as having been written entirely by McCartney. McCartney recalled writing it in the basement music room at 57 Wimpole Street in central London. The house was the family home of his girlfriend, actress Jane Asher, where McCartney lodged from November 1963. Working on a piano, he composed the melody first, beginning it as an uptempo country and western-inflected piece. After he played it on the piano at a family gathering, his aunt Gin enjoyed the tune, prompting him to give it the working title "Auntie Gin's Theme". He added fast-paced lyrics which may have been inspired by his relationship with Asher, turning the song into a cheerful love ballad."