An Officer and a Gentleman is a 1982 American drama/romance film that stars Richard Gere, Debra Winger and Louis Gossett, Jr., who won the Academy Award for Best Supporting Actor for the film, and was produced by Lorimar Productions for Paramount Pictures. It tells the story of Zack (Gere), a U.S. Navy aviation officer candidate who is beginning his training at Aviation Officer Candidate School. While Zack meets his first true girlfriend during his training, a local young woman named Paula (Winger), he also comes into conflict with the hard-driving Marine Corps Gunnery Sergeant (Gossett, Jr.), the drill instructor training his class. It was written by Douglas Day Stewart and directed by Taylor Hackford. The film's title uses an old expression from the British Royal Navy and subsequently from the U.S. Uniform Code of Military Justice, as being charged with "conduct unbecoming an officer and a gentleman" (from 1860). The film was commercially released in the U.S. on July 28, 1982. It was well received by critics, with a number calling it the best film of 1982. The film was a financial success, grossing $129.7 million against a $6 million budget.

An officer and a gentleman is a concept and phrase widely used in and about the British armed services from at least the early nineteenth century. The phrase was codified in Article 133 of the US Uniform Code of Military Justice which allows "Conduct unbecoming of an officer and a gentleman" to be punished by a court martial.