Alton Glen "Glenn" Miller (March 1, 1904 – December 15, 1944) was an American big band conductor, arranger, composer, trombonist, and recording artist before and during World War II, when he was an officer in the US Army Air Forces. His civilian band, Glenn Miller and his Orchestra, was one of the most popular and successful bands of the 20th century and the big-band era.
Glenn Miller and his Orchestra was the best-selling recording band from 1939 to 1942. Unlike his military unit, Miller's civilian band did not have a string section, but it did have a stand-up bass in the rhythm section. It was also a touring band that played multiple radio broadcasts nearly every day. Its best-selling records include Miller's theme song, "Moonlight Serenade", and the first gold record ever made, "Chattanooga Choo Choo", a song on the soundtrack of Miller's first film, Sun Valley Serenade, and the number-one song in the United States on December 7, 1941.