Half Moon Street is a 1986 American erotic thriller film directed by Bob Swaim and starring Sigourney Weaver, Michael Caine, Keith Buckley, and P. J. Kavanagh.

The film is about an American woman working at a foreign research and policy institute in London who moonlights for a British escort service, becoming involved in the political intrigues surrounding one of her clients.

[4] Dr. Lauren Slaughter, Ph.D., is an American academic living in London, where she holds a prestigious but low-paid job at a Middle East policy institute.

However, Bulbeck's work on a delicate Middle East peace process forces him to miss a series of dates, causing Slaughter to feel rejected.

Roger Ebert gave Half Moon Street three out of four stars, concluding that the film "is interesting primarily because of the interaction between Weaver and Caine.