- Who is the egg anyway?
- I'm the egg.
- And he's a good egg too.

3 seconds sound clip from the Holiday (1938) movie soundboard.

You can hear this line at 00:23:25.677 in the Blu-ray version of the movie.

Quote context

[...]

- Oh, Neddie, shut up.

- Did Julia tell Father?

- I haven't been up here in years.

- What did Father say?

- Oh, we left Father talking about that guy to Mr. Hobson in front of church.

- Who is the egg anyway?

- I'm the egg.

- And he's a good egg too.

- Johnny Case, my brother Ned.

- How are you?

- Congratulations.

- Well, this place gives me the creeps.

- I've been telling Johnny about some of our childhood dreams.

- Some dreams.

- It's in tune.

- Yes, I thought you might want to come back up here some day and finish that concerto you were writing.

- Oh, the Seton Concerto in F Major.

[...]