<Tr> <Th> Composer (s) </Th> <Td> Harry Warren </Td> </Tr> <Tr> <Th> Lyricist (s) </Th> <Td> Mack Gordon </Td> </Tr> <P> "You'll Never Know" is a popular song with music written by Harry Warren and the lyrics by Mack Gordon . The song is based on a poem written by a young Oklahoma war bride named Dorothy Fern Norris . </P> <P> The song was introduced in the 1943 movie Hello, Frisco, Hello where it was sung by Alice Faye . The song won the 1943 Academy Award for Best Original Song, one of nine nominated songs that year . It was also performed by Faye in the 1944 film Four Jills in a Jeep . </P>

Who wrote you'll never know just how much i love you