Filmed at Pinewood Studios under the direction of Anthony Asquith and co-star Leslie Howard (who played Professor Henry Higgins), the production was a milestone in British cinema. Shaw kept a close eye on the adaptation, even contributing new dialogue and scenes specifically tailored for the film medium, including the famous ballroom scene and Eliza’s phonetics lesson sequence (“The rain in Spain…”).

The film made cinematic history when Hiller uttered Eliza’s iconic line, “Not bloody likely!,” breaking taboos around profanity in mainstream English-language film at the time. This production set the standard for future adaptations of Shaw’s play, most notably serving as the direct structural and narrative blueprint for the 1956 theatrical musical My Fair Lady, which in turn led to the 1964 film of the same name.

In stark contrast to her character’s early look, set photographs show Hiller transformed into an aristocratic figure, wearing an exquisite white gown and tiara for the grand ballroom sequences. Her fierce, grounded portrayal earned her an Academy Award nomination for Best Actress, making her the first British actress to receive a Lead Actress Oscar nomination for a British film.