Lovers and Other Strangers is a 1970 American romantic comedy film directed by Cy Howard, adapted from the 1968 Broadway play by Renée Taylor and Joseph Bologna. The cast includes Richard S. Castellano, Gig Young, Cloris Leachman, Anne Jackson, Bea Arthur, Bonnie Bedelia, Michael Brandon, Harry Guardino, Anne Meara, Bob Dishy, Marian Hailey, Joseph Hindy, and, in her film debut, Diane Keaton. Sylvester Stallone was an extra in this movie.

The film was nominated for three Academy Awards (it won the Academy Award for Best Original Song), and was one of the top box-office performers of 1970. It established Richard S. Castellano as a star (receiving an Oscar nomination for his performance) and he and Diane Keaton were cast in The Godfather (1972). The Oscar-winning song, "For All We Know", was composed by Fred Karlin, with lyrics by Bread's Jimmy Griffin and Robb Royer. It was famously covered by The Carpenters.

Lovers and Other Strangers was originally distributed by Cinerama Releasing Corporation. The film was released on VHS in 1980 by Magnetic Video, but was soon deleted. The Magnetic Video release was a collector's item for many years, but the film was eventually re-released on VHS by CBS/Fox Video in the 1990s. It is now available on DVD from MGM Home Entertainment, and on Blu-ray by Kino-Lorimer.

Taylor and Bologna followed up with their second screenplay the following year, Made for Each Other in which they also starred.