Let's Live a Little is a 1948 American romantic comedy film directed by Richard Wallace and starring Hedy Lamarr, Robert Cummings and Anna Sten.

Written by Howard Irving Young, Edmund L. Hartmann, Albert J. Cohen, and Jack Harvey, the film is about an overworked advertising executive who is being pursued romantically by his former fiancée, a successful perfume magnate, who is also the ad agency's largest client.

While visiting a new client—a psychiatrist and author—to discuss a proposed ad campaign, his life becomes further complicated when the new client turns out to be a beautiful woman, who decides to treat his nervous condition.

[3] At Montgomery Advertising in New York City, Duke Crawford (Robert Cummings) is having trouble handling the account of cosmetics manufacturer Michele Bennett (Anna Sten), one of the company's most important clients—and his former fiancée.

When Duke threatens to quit Michele's account, his boss James Montgomery (Harry Antrim) assigns him to do the book promotion for a new client, a nerve psychologist named J.O.

While taking a taxi to the psychologist's office, Duke shaves with an electric razor he invented, but his nervousness and stress result in leaving half his mustache intact.

Wanting to observe the encounter for scientific reasons, Jo arrives at the nightclub with her stuffy surgeon boyfriend, Dr. Richard Field (Robert Shayne).

When Michele notices that Duke and Jo are falling in love, and when she is served a cake with an advertising contract inside instead of a marriage license, she throws his drink at him and storms out of the nightclub.

Let's Live a Little was the first film produced by Robert Cummings and Eugene Frenke and their company, United California Productions (UCP).

[4] UCP originally arranged for the film to be financed and released through United Artists but this was eventually terminated and they made a deal instead with a new company, Eagle-Lion.

[10] A radio version of the film was broadcast on Screen Directors' Playhouse on January 16, 1949 and starred Robert Cummings and Betty Lou Gerson.