"Moonlight Serenade" is an American swing ballad composed by Glenn Miller with subsequent lyrics by Mitchell Parish.

It was an immediate phenomenon when released in May 1939 as an instrumental arrangement, though it had been adopted and performed as Miller's signature tune as early as 1938, even before it had been given the name "Moonlight Serenade".

[5] Jazz critic Gary Giddins wrote about the song's impact and legacy; "Miller exuded little warmth on or off the bandstand, but once the band struck up its theme, audiences were done for: throats clutched, eyes softened.

The 1939 RCA Victor studio recording of "Moonlight Serenade" was released by the U.S. War Department as Army V-Disc 39A, VP 75, Theme Song, in November 1943.

A new recording by Glenn Miller with the American Band of the Allied Expeditionary Forces (AEF) was broadcast to Germany in 1944 on the radio program The Wehrmacht Hour.