The Opening of Misty Beethoven is an American hardcore pornography film released in 1975. Produced with a relatively high budget and filmed on elaborate locations in Italy and New York City with a musical score, it owes much to its fastidious director Radley Metzger (directing this film as Henry Paris).

In an era in which pornography was just beginning to be widely released, most movies of that time were expected to have at least minimal plots. Misty's plot was more elaborate than most; it was based directly on the Pygmalion legend and, more recently, George Bernard Shaw's play of the same name, as well as the Broadway and Hollywood success My Fair Lady. It was also satirical, with many added comic touches and dialog designed for laughs.

The Opening of Misty Beethoven has the distinction of being the first widely-released porn movie to feature pegging, female-on-male anal sex via a strap-on dildo.

The leads were Constance Money (playing the title role), Jamie Gillis, Jacqueline Beaudant, and Gloria Leonard.

According to the DVD commentary, cinematographer Robert Rochester would later win an Academy Award, under a different name, for his work on a documentary he had filmed previously.

Pornography meets Pygmalion. Misty, the hooker, meets the sexologist who thinks he can transform her from "the nadir of passion" into someone who inspires passion. While Misty is trained for her big test, seducing a homosexual artist, the relationship between the doctor and Misty remains unsettled. Written by John Vogel