George Seaton did some uncredited directing of retakes and additional scenes while director Gregory Ratoff was unavailable. As an actor, Ratoff was best known for his role as producer "Max Fabian" in All About Eve (1950).
Co-stars June Haver (Lucilla Powell/Gretchen/Indian) and Fred MacMurray (Bill Morgan) first met while working on this film and would marry ten years later, in 1954. This was the only time the pair appeared together in a film.
The song "Morale" was included in the film, sung and danced by June Haver and Chorus at the USO Canteen, even though by the time of the film's release, in May 1945, World War II was almost over, and morale would shortly no longer be an issue.
Joan Leslie's (Sally Smith/Prudence/Katrina) singing voice was dubbed by soprano Sally Sweetland. In the 1940s, Sweetland provided singing voices in movies, notably for Leslie in Yankee Doodle Dandy (1942) and Rhapsody in Blue (1945).
This film is notable as composer Kurt Weill's only musical written directly for the screen and for its outdated blend of history and contemporary (1940s) slang. At the time, the mock-operatic sequence, "Columbus (The Nina, the Pinta, the Santa Maria)" was one of the longest musical sequences ever created for a screen musical.