"My One and Only Love" is a popular song with music written by Guy Wood and lyrics by Robert Mellin. The song was published in 1952 and is a conventional 32-bar song with four 8-bar sections, including a bridge. The structure of this common "Type A" 32-bar form is represented as AABA. The song is invariably taken at a slow tempo, or as a ballad with an aria-like melody that would represent a challenge to many vocalists. In the key of C the melodic arc of the song extends from G below middle C to the second D above middle C.