"Small Fry" is an American popular song written in 1938 by Hoagy Carmichael and Frank Loesser.

In the film, Crosby sings it in a musical sequence with a young Donald O'Connor and Fred MacMurray.

Crosby recorded the song on July 1, 1938[1] with Johnny Mercer dueting and this reached the No.

[3] Other versions have been recorded by Mildred Bailey (she reached #9 in the charts in 1938),[4] Al Bowlly (recorded on October 14, 1938 - see Al Bowlly Discography), Crystal Gayle (used in her album Crystal Gayle Sings the Heart and Soul of Hoagy Carmichael), June Christy,[5] and Matt Monro.

[6] There was a Fleischer Studios (direction by Dave Fleischer) animated cartoon in 1939 that used the song "Small Fry" to portray a story behind the song as a warning to youngsters to not want to grow up too quickly.