Once More, My Darling is a 1949 American comedy film directed by and starring Robert Montgomery alongside Ann Blyth, Jane Cowl and Charles McGraw.

When he is unexpectedly called up by the United States Army Reserve with the rank of captain, Collier is given a peculiar assignment.

Superior officer Colonel Head, cooperating with law enforcement, tells Collier about a jewel heist and how one of the gems has been spotted in a perfume ad, worn by Marita "Killer" Connell, a young actress.

Pretending to be a survey taker, he makes her acquaintance at a Beverly Hills hotel where Marita is immediately smitten.

So much so that she insists on meeting his mother, crashing Mrs. Laing's party of distinguished guests in an altogether unsuitable outfit and offending them with the scent of her terrible perfume.