Jeannette MacDonald and Nelson Eddy had their first teaming in the musical "Naughty Marietta" in 1935. They went on to make "The New Moon," "I Married an Angel," my favorite, "Maytime," and many others. Both performers were operatically trained, Eddy possessing a magnificent high baritone, and MacDonald a coloratura soprano. If her high notes don't have frontal placement and seem to back off, it's still a pretty voice, and of the two, she was the actor as well as being a great beauty.
Though the film uses the Victor Herbert score, it differs in plot from the actual musical. Here, a princess ordered to marry one Don Carlo replaces her maid, Marietta, on a ship that carries women to New Orleans to look for a husband. Right before they arrive, pirates attack the ship and the women are rescued by mercenaries, headed by Richard Worthington (Eddy). With her beauty and obvious education, Marietta sticks out and begins a love-hate relationship with the vain Worthington. Soon, however, a messenger arrives - the King is looking for his escaped princess.
The couple sing "Ah, Sweet Mystery of Life," while Eddy leads his men in "Tramp, tramp, tramp," and MacDonald entertains with the "Italian Street Song," and "Chansonette" among other solos that each has.
This isn't the greatest MacDonald-Eddy musical, but it was a huge hit and started them off on their partnership. Were they in love in real life? Supposedly they were and never got together because Eddy wouldn't have wanted her to work. But take a look at Gene Raymond. He kind of looks like Nelson Eddy.