The song was written by Sammy Fain and Paul Francis Webster.

Johnny Mathis performed the song in the film, and the song reached number 4 on the UK chart.

[1] The music was written by Sammy Fain with lyrics by Paul Francis Webster for the 1958 film of the same name, based on the novel, also titled A Certain Smile, by Françoise Sagan.

Johnny Mathis, who appeared in the 1958 film as a bar singer, performing the title song.

Mathis's recording, with backing orchestration by Ray Ellis and released in June 1958 (4-41193), backed with "Let It Rain".