station set. The band continues with the production number and accompanies Dorothy Dandridge and the Nicholas Brothers in their song and dance routine. Sun Valley Serenade is the first of the only two movies featuring The Glenn Miller Orchestra (the other is 1942's Orchestra Wives). Besides "Chattanooga Choo Choo", other Glenn Miller tunes in the film are "Moonlight Serenade", "It Happened in Sun Valley", "I Know Why (And So Do You)", and "In the Mood". An instrumental version of "At Last" was recorded by Glenn Miller and his Orchestra as well as a version with vocals by John Payne and Pat Friday, but these recordings would remain unused and unissued except for the 1954 LP album. Darryl Zanuck reportedly said. "There are too many big ones in this. Let's save one for the next." "At Last" can be heard in the movie in three scenes, however, in an orchestral performance by Glenn Miller and His Orchestra film in the Lido Terrace night club after they perform "In the Mood", as part of the orchestral background score in a scene between John Payne and Lynn Bari, and in an orchestral version with vocalization but without lyrics a minute and twenty seconds in length during the closing skating sequence with Sonja Henie. "At Last" would also appear in the 1942 follow-up movie Orchestra Wives performed by Glenn Miller and his Orchestra with vocals by Ray Eberle and Pat Friday. Los Angeles vocalist Pat Friday pre-recorded the vocal tracks that Lynn Bari lip synced in the film. Filming Sun Valley Serenade was filmed in March 1941, by Darryl Zanuck. Zanuck had come up with the idea for the film while on holiday there. Popular myth to the contrary, nearly all of the filming was done on the 20th-Century Fox sound stages in Hollywood. Only a few actors travelled to Sun Valley for exterior location shots. The film became a Hollywood hit and served as a recruiting effort for the elite ski corps of the 10th Mountain Division stationed at Camp Hale in Colorado. Sun Valley's ski school director, Otto Lang, of St. Anton, oversaw the skiing scenes. The musical numbers were recorded in multi-directional mono, placing microphones around different parts of the orchestra. Those were all mixed down to mono at the time the film was released. The parts of those recordings were found and mixed into true stereo. They have also been