Unfaithfully Yours is also considered unique as the only Sturges film to take place almost exclusively in "a milieu of high culture" (according to critic James Harvey), focusing as it does on the world of classical music. The film was based on a 1933 short story by Sturges then titled "Symphony Story," and initially proposed under the title Unfinished Symphony. The film starred Rex Harrison, but was held back by Fox from summer 1948 until Christmas (due to concerns for negative publicity following the suicide of actress Carol Landis, long-rumored as the then-married Harrison's lover).