"Let a Smile Be Your Umbrella" is a popular song, first published in 1927. The music was written by Sammy Fain, and the lyrics by Irving Kahal and Francis Wheeler. It was the first collaboration between the Fain / Kahal team.
Successful early recordings were made by Roger Wolfe Kahn (vocal by Franklyn Baur) and by Sam Lanin (vocal by Irving Kaufman), and these both charted in 1928. [1]
The song has been recorded by multiple singers and bands since its release, with a flurry of recordings in the 1950s: