You're the darndest girl, Liz.
4 seconds sound clip from the The Philadelphia Story movie soundboard.
You can hear this line at 00:29:26 in the Blu-ray version of the movie.
Quote context
[...]
- You mean you were, but now you're divorced? Well, come now, surely you're not ashamed of it.
- Of course I'm not ashamed of it.
- What?
- Well, it was years ago. I was only a kid in Duluth.
- Well, good heavens, Liz, you never told me anything.
- You're the darndest girl, Liz.
- Duluth. That must be a lovely spot. It's west of here, isn't it?
- Sort of, but occasionally we get the breezes.
- Thirty.
- None.
- How sweet. Are you... going together?
[...]