Down with Love is a 2003 romantic comedy film directed by Peyton Reed. It stars Renée Zellweger and Ewan McGregor and is a pastiche of the early-1960s American "no-sex sex comedies", such as Pillow Talk and Lover Come Back (both starring Rock Hudson, Doris Day, and Tony Randall) and the "myriad spawn" of derivative films that followed. Time film critic Richard Corliss wrote that Down with Love "is so clogged with specific references to a half-dozen Rock-and-Doris-type comedies that it serves as definitive distillation of the genre."

Randall himself plays a small role in Down with Love, "bestowing his sly, patriarchal blessing" on the film, which also stars David Hyde Pierce in the neurotic-best-friend role often played by Randall or Gig Young, Sarah Paulson, Rachel Dratch, Jeri Ryan, and Jack Plotnick, who spoofs the kind of role Chet Stratton played in Lover Come Back.

Typical of the genre, the film tells the story of a woman who advocates female independence in combat with a lothario. The plot reflects the attitudes and behaviour of the early pre-sexual revolution 1960s, but has an anachronistic conclusion driven by more modern, post-feminist ideas and attitudes. Though the film received a mixed critical response at the time of release and underperformed at the box office, it has since undergone a critical reappraisal and grown a cult following for its subversion of rom-com conventions.

In 1962, aspiring author Barbara Novak arrives in New York to promote her book, Down with Love, to Banner House publishing. It is about freeing women from love, enjoying sex without commitment, and replacing the need for a man with things such as chocolate. Barbara believes that her rules will help boost women in the workplace and the world in general.

When Banner House's male executives do not appreciate the book, Vikki Hiller, Barbara's editor, suggests that Barbara meet with Catcher Block—a successful writer for Know magazine—to help promote the book. However, Catcher repeatedly avoids meeting Barbara until, fed up, she insults him. Catcher's boss and best friend, Peter MacMannus, and Vikki develop a mutual attraction, but neither is brave enough to express their feelings. Peter feels overshadowed by Catcher's strong personality, and Vikki wants to see strength in her lover, even assuming Peter must be gay.

Barbara and Vikki persuade Judy Garland to sing "Down with Love" on The Ed Sullivan Show to promote the book. Sales skyrocket, as women around the world rebel against their men; Catcher now wants to meet Barbara but she rejects him. The breaking point comes as Barbara appears on a national TV show and discusses a chapter from her book—"The Worst Kind of Man"—and cites Catcher Block as the perfect example, causing the women he dates to reject him.

Catcher schemes to prove that Barbara really wants love and marriage like every other woman. He poses as Major Zip Martin, an attentive astronaut with a Southern accent. Barbara becomes infatuated with a man who seems unaware of her celebrity, in contrast to the men who now avoid her since her book was published. As "Zip" takes her to fashionable New York locations, he maintains sexual tension by feigning naiveté and a desire to remain chaste until he is "ready" for a physical relationship. His plan becomes complicated after he starts falling for her.

When Barbara encounters Catcher/Zip at a party, which nearly exposes his true identity, he decides to take things to the next level. He says that Catcher Block wants to interview him for an exposé on the NASA space program and asks her to be there. At his apartment, he sets everything up to record her saying that she loves him. As they are about to have sex, one of his lovers, Gwendolyn, walks in. Not knowing who Barbara is, she exposes Catcher's identity, forcing him to confess to Barbara.