You're in the Navy Now is a 1951 American war-comedy film about the United States Navy in the first months of World War II. The film was directed by Henry Hathaway and stars Gary Cooper as a new officer wanting duty at sea but who is instead assigned to an experimental project without much hope of success. It was released by 20th Century Fox and its initial release was titled U.S.S. Teakettle. When the film failed to gain an audience, it was re-titled to the present title.

Filmed in black-and-white aboard the active Navy patrol craft PC-1168, You're in the Navy Now featured the film debuts of Charles Bronson, Lee Marvin and Harvey Lembeck in minor roles as crewmen. Screenwriter Richard Murphy was nominated by the Writers Guild of America for "Best Written American Comedy", basing his script on an article written by John W. Hazard in The New Yorker. Hazard, a professional journalist and naval reservist, had served during World War II as executive officer of the PC-452, a similar craft that served in 1943–44 as a test bed for steam turbine propulsion.