Oddly enough,
My Fair Lady was the musical adaptation of
Pygmalion. Then they decided to make a movie based on
My Fair Lady, not
Pygmalion (which is odd, since
My Fair Lady is based on
Pygmalion). They did this even though
Pygmalion and
My Fair Lady had been adapted into movie versions (one a musical, the a straight movie). This movie was called
Educating Rita.
Another movie that was based on
Pygmalion/
My Fair Lady was
Born Yesterday. They later on remade this film with
Melanie Griffith and
Don Johnson.