The only persons who have business backstage are the members of the Opera company, all of whom you know. That is all.
6 seconds sound clip from the Phantom of the Opera (1943) movie soundboard.
You can hear this line at 01:07:31.876 in the Blu-ray version of the movie.
Quote context
[...]
- Inspector Daubert has a plan of his own, and we must give it every chance.
- Perhaps you'd enjoy seeing the opera from the orchestra pit.
- And Anatole Garron is the baritone.
- I'm sorry, Christine. But I'm really concerned about what may happen tonight.
- Wait for me, please, in your dressing room.
[...]