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"Moonlight Serenade" is an American popular song with original music by Glenn Miller and subsequent lyrics by Mitchell Parish. It was originally named "Now I Lay Me Down To Weep".
When Miller recorded "Sunrise Serenade" in 1939, he placed this song on the back. The song, recorded on April 4, 1939 on RCA Bluebird, was a Top Ten hit on the U.S. pop charts in 1939. It was the no.5 top pop hit of 1939 on Billboard.
Glenn Miller had 5 records in the top 20 songs of 1939 on Billboard's list. In the UK, "Moonlight Serenade" was released as the A side of a 78 on His Master's Voice with "American Patrol" as the B side.
It was an immediate phenomenon when first released in May, 1939 as an instrumental arrangement and was adopted as Miller's signature tune.