Sandy Descher played the character "Suzie," but her scenes were deleted from the released print.
Greer Garson was originally set to play the lead role of Marjorie Lawrence, but the film was postponed for about one year. Garson wanted the part very badly and researched the role extensively. One month after she left MGM (the studio filming the movie), Eleanor Parker was cast.
Glenn Ford was suffering a lull in his career when offered the part of Dr. King. Even so he made it a condition that he receive top billing, which rightfully belonged to the movies' star Eleanor Parker, or he wouldn't do the part. Ms. Parker says she always cared more about the projects than the billing, but this is one time she regrets giving in because she very much wanted the credit as star of the picture. She also says that Mr. Ford shamelessly tried to upstage her at every chance by walking away from her, and the camera, forcing her to turn her back to the camera to interact with him.
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 film on her own. She rented a cabin in 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, Ms. Parker 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 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.