One of the most perfect movies ever made. A dialogue lover's dream!

Agreed. And here's some more dialogue from the movie:

Tracy Lord: I'm going crazy. I'm standing here solidly on my own two hands and going crazy.

Macaulay Connor: Oh Tracy darling...
Tracy Lord: Mike...
Macaulay Connor: What can I say to you? Tell me darling.
Tracy Lord: Not anything - don't say anything. And especially not "darling."

Macaulay Connor: It can't be anything like love, can it?
Tracy Lord: No, no, it can't be.
Macaulay Connor: Would it be inconvenient?
Tracy Lord: Terribly.

Margaret Lord: The course of true love...
Macaulay Connor: ...gathers no moss.

Elizabeth (Liz) Imbrie: What's this room? I've forgotten my compass.
Macaulay Connor: I'd say, south-by-southwest parlor-by-living-room.

Macaulay Connor: This is the Bridal Suite. Would you send up a couple of caviar sandwiches and a bottle of beer?
Margaret Lord: What? Who is this?
Macaulay Connor: This is the Voice of Doom calling. Your days are numbered, to the seventh son of the seventh son.
Margaret Lord: Hello? Hello?
Tracy Lord: What's the matter?
Margaret Lord: One of the servants has been at the sherry again.

Tracy Lord: I never knew such a man.
Macaulay Connor: You're not likely to dear. Not from where you sit.

Macaulay Connor: You've got all the arrogance of your class, haven't you?
Tracy Lord: What have classes to do with it? What do they matter except for the people in them? George comes from the so-called lower class, Dexter, the upper. Well?
Macaulay Connor: Well...
Tracy Lord: Mac the night watchman is a prince among men, Uncle Willie is a... pincher. Upper and lower my eye. I'll take the lower, thanks.
Macaulay Connor: If you can't get a drawing room.
Tracy Lord: What does that mean?
Macaulay Connor: My mistake.
Tracy Lord: Decidedly. You're insulting!
Macaulay Connor: Sorry.
Tracy Lord: Oh, don't apologize!
Macaulay Connor: Well, who's apologizing?
Tracy Lord: I never knew such a man.
Macaulay Connor: You wouldn't be likely to, from where you sit!
Tracy Lord: Talk about arrogance.
Macaulay Connor: Tracy.
Tracy Lord: What do you want?
Macaulay Connor: [pause] You're wonderful.

Tracy Lord: [Tracy and Mike have almost kissed. Both are very drunk] Has your mind taken hold again, dear professor?
Macaulay Connor: Good thing, don't you agree?
Tracy Lord: No, professor.
Macaulay Connor: [angrily] Alright, lay off that "professor" stuff! Now, do you hear me?
Tracy Lord: Yes, professor...

Macaulay Connor: Doggone it, C.K. Dexter Haven. Either I'm gonna sock you or you're gonna sock me.
C. K. Dexter Haven: Shall we toss a coin?

[Dexter has just proposed]
Tracy Lord: Oh Dexter you're not doing it just to soften the blow?
C. K. Dexter Haven: No.
Tracy Lord: Nor to save my face?
C. K. Dexter Haven: Oh, it's a nice little face.
Tracy Lord: Oh Dexter, I'll be yar now, I promise to be yar.
C. K. Dexter Haven: Be whatever you like, you're my redhead.
Uncle Willie: [hung over] Awww... this is one of those days that the pages of history teach us are best spent lying in bed.