The film's main music theme by Bronislau Kaper was published as a song, "Green Dolphin Street" (also known as "On Green Dolphin Street"), with lyrics by Ned Washington. It soon was adopted by jazz musicians, with recordings by Ella Fitzgerald, Miles Davis, Bill Evans, and others.
According to MGM production files, the rights were purchased with Katharine Hepburn in mind for the starring role.
Whether it was a wig or dye, Lana Turner let her hair go back to its natural brown color for this role.
According to a January 1986 "Hollywood Reporter" article, Donna Reed initially did not want to play Marguerite because she thought that Lana Turner was prettier and audiences would not believe that William (Richard Hart) would chose her over Turner.
According to a contemporary article in The Hollywood Reporter, Gregory Peck and Laraine Day were slated to appear in the starring roles, with production to start in the summer of 1945.