"You'll Never Know", sometimes referred to as "You'll Never Know (Just How Much I Love You)" in later years, is a popular song with music written by Harry Warren and the lyrics by Mack Gordon.
[1] The song is based on a poem written by a young Oklahoma war bride named Dorothy Fern Norris.
[2][failed verification] The song was introduced in the 1943 movie Hello, Frisco, Hello where it was sung by Alice Faye.
[1] It was also performed by Faye in the 1944 film Four Jills in a Jeep.
However, Faye never released a record of the ballad, and frequent later recordings of the song by other singers diminished her association with it.