Lubitsch's description of this story as “caviar” is no overstatement. Unfaithfully Yours is possibly Sturges' most sophisticated and complex creation. In this film, there is a perfect balance and proportion between music, dialogue and visuals. From first frame to last, each of these elements serves to complement the other. Switching from fantasy to reality, from slapstick to black comedy with a smoothness unrivalled in American comedy, Sturges weaves a cynical story of adultery and deception. Rex Harrison is ideally cast as a suave British symphony conductor who plots revenge for his wife's infidelity during the clashing climaxes of a Rossini score, or a Wagner overture.