- Oh, I can't imagine what makes me so sleepy.
- Couldn't be the company, could it?

6 seconds sound clip from the The Philadelphia Story movie soundboard.

You can hear this line at 01:17:57 in the Blu-ray version of the movie.

Quote context

[...]

- Oh, Mike, we're out of our minds.

- Right into our hearts.

- That ought to have music.

- It does, doesn't it?

- It's as if my insteps were melting away. What is it? Have I got feet of clay or something?

- It's not far to the pool. It's just over the lawn and in the birch grove. It'll be lovely now.

- Tracy, you're tremendous.

- Put me in your pocket. Mike.

- Oh, I can't imagine what makes me so sleepy.

- Couldn't be the company, could it?

- Well, well, it's you, Mr. Dexter. I heard you were about.

- Any prowlers around?

- No, no, no prowlers.

- Can Miss Imbrie get in this way?

- If she can't, you can always go in the back.

- Thanks, Mac. Good night.

- Good night, sir.

[...]