- What is it?
- Your father.

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

You can hear this line at 00:35:28 in the Blu-ray version of the movie.

Quote context

[...]

- I don't suppose a man ever had a better or finer family. You know, I often wake up in the night and say to myself: 'You lucky dog. What have you done to deserve it all?' -And what have you?

- Oh, thank you.

- Oh! Oh!

- How stupid! Oh, dear, how awful!

- Yeah, I had a feeling that would happen.

- Your camera! I'm... Well, I'm so, so sorry.

- I'm sure you are.

- What is it?

- Your father.

- Uncle Willie! Uncle Willie. How nice.

- I beg your pardon.

- Please go on into lunch, everyone. I want a word with Uncle Willie.

- Another place, Edward.

- Yes, madam. (2)

- I'm afraid I don't understand.

- You never have. But you came anyway, didn't you?

[...]