Claude Dauphin was considered for the role of Monsieur Brun.
Peter Stephens was a candidate for the role of Brun.
Marius is 19 and Fanny is 18 at the beginning of the play. In reality, Horst Buchholz was 28 and Leslie Caron was 30 when they played their respective roles.
The New York production of "Fanny" opened at the Majestic Theater in New York on November 4, 1954 and ran for 888 performances.
This production of "Fanny" began as a hit Broadway musical in 1954, with the libretto co-authored by Joshua Logan, who also directed the show, which starred Ezio Pinza, in his last stage role before his death, as Cesar, Walter Slezak as Panisse, and Florence Henderson as Fanny. When the musical was filmed, Logan stayed on as director, and the film was faithful to the show, except for the fact that Logan dropped all of the songs and simply used them as background scoring.