Love with the Proper Stranger is a 1963 romantic comedy drama film made by Pakula-Mulligan Productions and Boardwalk Productions and released by Paramount Pictures. It was directed by Robert Mulligan and produced by Alan J. Pakula from a screenplay by Arnold Schulman.
The film stars Natalie Wood, Steve McQueen, Edie Adams, Herschel Bernardi and Harvey Lembeck. The film also marked the screen debut of Tom Bosley and features a brief, uncredited appearance by the director's younger brother Richard Mulligan, who later became a well known television actor.
The film's title song, written by Elmer Bernstein and Johnny Mercer, was recorded by Jack Jones.
(Summary from Wikipedia)