Nelson Eddy, Susannah Foster, Claude Raines. It's not the best movie and I'm not blown away by the music (the made-up stuff). However, it had cute moments and Nelson is in excellent voice, even if the music is so-so, with the exception of Marta in the beginning (Nelson showing off--I love that kind of thing). Claude Rains has never acted worse (and it's hard to believe that that little violinist has it in him to kill a number of people with his bare hands). Nelson Eddy has as good an acting performance as anyone in the movie (which is not much of a compliment) with his made-up part (and top billing), and there is a modicum of humor in the film with Nelson's rivalry with the police inspector/Raoul. Two other items of note: The bust of Susanna York (who sings pretty well--she could hit the F above high C quite well, but I don't think anyone sounds pretty up there) was actually sculpted by Eddy, who I have read, also, to help with costs, sang the bass voice heard (but not really seen) during opera sequences. I listened to the film and you can tell it's him if you really know his voice--and I do. I had also read that the tenor was him, but I never could tell that it was. I personally don't think it is. It's OK with me; I thought it was a less than impressive tenor. The last operatic sequence is all in Russian and is primarily Nelson singing bass and, especially, baritone. Yum. It's kind of ironic that the fellow who sang tenor [trilly tenor] in Rose Marie's operatic sequences had a flop of a movie with JMcD ("Firefly"--I haven't seen it) left MGM because "all the good singing parts were going to Eddy". He moved to Universal and, when Eddy got out of his MGM contract (and didn't sign another one), Universal got Eddy to take this part, instead of their resident tenor. Oh, well. Can't say I blame them, because he sounds wonderful and is, as usual, charming.***