According to the book "Clint: A Retrospective" (2012) by Richard Schickel, Clint Eastwood liked the idea of working with William Holden. Schickel states that the film "confounded expectations and alienated many of Eastwood's fans".
One of two early 1970s movies directed by Clint Eastwood which involved story-lines with provocative sexuality. This film featured a relationship between a seasoned man and a very young woman whilst Play Misty for Me (1971) featured a one night stand that escalated into violence.
The location setting of flower-child Breezy (Kay Lenz)'s hippie commune was Laurel Canyon. According to Danny Peary's book "Guide for the Film Fanatic" (1987), Clint Eastwood actually liked the counterculture character figure of 'Breezy'.
Danny Peary in his book "Guide for the Film Fanatic" (1987) states "not many people paid attention to the film upon release" whilst Richard Schickel in his book "Clint: A Retrospective" (2012) states that the film in theaters "came and went virtually without notice".
When Frank and Breezy go on their movie date, the film they attend is Clint Eastwood's previous picture High Plains Drifter (1973). Eastwood's image is on the poster for the western which can be seen outside the theater. Eastwood can also be seen in the film briefly at a marina.
Clint Eastwood had the scare of his life when his wife Maggie unexpectedly showed up to the set and met his longtime mistress Roxanne Tunis. A crew member calmly introduced the two women while Clint ran and hid.
During the first half of 1972, Sondra Locke went over to Universal on the recommendation of screenwriter Jo Heims and met Clint Eastwood for the first time. She didn't actually audition for the part of Breezy. They just chatted and the meeting seemed to have no impact on Clint. Born in 1944, Locke was much too old for a character that needed to be as youthful as possible to emphasize the May-September disparity. She of course was disappointed not to get the role. Three years later, Locke's agent called her and said Eastwood wanted to know if she'd come in for a meeting on The Outlaw Josey Wales (1976). The rest, as they say, is history.
Actress Kay Lenz was nineteen years-old when she appeared in this movie whilst actor William Holden was fifty-four years-old. The characters they played were stated as being about nineteen and fifty years-old respectively. As such, the age difference between the characters was thirty-one years but the real age difference between the actors at the time was thirty-five years.