Eleanor Parker can read music, and has perfect pitch as a singer. She decided to study the scores of the opera songs used in this movie on her own. She rented a cabin in Lake Arrowhead, California, and played the records while singing along, until she had the breathing and phrasing memorized. Then when filming the scenes, instead of lip-synching to the tracks recorded by Eileen Farrell for the movie, she sang full voice (but an octave lower). She is proud of the fact that they never had to do a re-take, in order to "match" the tapes. She nailed it on the first take every time.
The vocal student of Mme. Gilly (Ann Codee) who can't seem to hit the right note, which Marjorie Lawrence can, is Eileen Farrell, who dubbed Eleanor Parker's singing voice in the movie's arias.
Marjorie Lawrence was said to have been disappointed not to have been asked to dub Eleanor Parker herself.
Even though the story takes place in the 1930s and 1940s, once again MGM's indefatigably anachronistic designer, Helen Rose has clothed all the female participants in totally contemporary 1955 designs and fashions, as are also their hair styles.
Eleanor Parker always maintained that this was her favorite role, and in which, in her opinion, she gave her best performance.