- Then you're going through with it, huh?
- Through with what?
- The wedding.
- Why shouldn't I?

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

You can hear this line at 01:33:37 in the Blu-ray version of the movie.

Quote context

[...]

- Well, anyway, I... I had a simply wonderful evening. I hope you enjoyed it too.

- I enjoyed the last part of it.

- Really? Why especially the last?

- Well, Tracy, are you asking me?

- Oh, you mean the swim.

- Yeah. We did swim. And so forth, didn't we?

- Oh, darling. What can I say to you? Tell me, darling.

- Not anything. Don't say anything, and especially not 'darling.'

- Then you're going through with it, huh?

- Through with what?

- The wedding.

- Why shouldn't I?

- Well, I made a funny discovery, that in spite of the fact that somebody's up from the bottom, he can still be quite a heel, and even though somebody else is born to the purple, he can still be a very nice guy.

- Why, I'm just repeating what you said last night.

- I said a lot of things last night, it seems.

- Okay. No dice.

[...]