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. Others in the cast include Linda Darnell, Lionel Stander, and Rudy Vallee.