- Are you all set, kid?
- I'm ready when you are.
- Okay. One, two, three.

4 seconds sound clip from the The Best Years of Our Lives (1946) movie soundboard.

You can hear this line at 02:10:00.163 in the Blu-ray version of the movie.

Quote context

[...]

- Hello, Homer.

- Hi, Steve.

- Say, Al Stephenson's back there.

- Al?

- Yeah. Hi, Al.

- Hello, Homer.

- How are you? How's the family?

- Fine, thanks.

- Hello, Homer.

- Hi, Butch. Say, let's show Al that new routine.

- Why, sure.

- Got something to show you, Al. Well, come on.

- Boy, wait till you hear this.

- Are you all set, kid?

- I'm ready when you are.

- Okay. One, two, three.

- What's the matter? Didn't you like it? We've been working for weeks.

- Sure, Homer, it was swell.

- I thought you were kidding about those piano lessons.

- Fred! Hey, Fred! That was Fred.

- Yeah.

[...]