Je suis mortifée. I'm très amazed.
7 seconds sound clip from the Ruggles of Red Gap (1935) movie soundboard.
You can hear this line at 00:28:15 in the Blu-ray version of the movie.
Quote context
[...]
- Well, hello, Effie. It's Effie, boys.
- Egbert, what does this mean?
- You see what I mean? He's a nice fellow too. It's a shame. You'll excuse him, will you, folks?
- Je suis mortifée. I'm très amazed.
- Bonsoir, madame. Bonsoir, madame.
- Effie? Erm... Effie? Er... I...
- Whoo!
- I suppose you two haven't been drinking.
- No!
- Yes. Well, we had to. He he made us.
- Yes, he pulled a long knife on us.
[...]