That's awfully nice of you.

3 seconds sound clip from the Miracle on 34th Street (1947) movie soundboard.

You can hear this line at 00:41:19 in the Blu-ray version of the movie.

Quote context

[...]

- Now you're a goose. No, you mustn't be a goose. Be a monkey. See?

- Mr. Kringle? Mrs. Walker just happened to mention that they're looking for a room for you here in town.

- That's right. Dr. Pierce doesn't want me to make that long trip every day.

- Well, I was just thinking. I'm all alone in my apartment - twin beds and plenty of room.

- Um, if you'd like to move in with me, I'd be only too happy to have you.

- That's awfully nice of you.

- You could ride to and from work every day with Mrs. Walker and...

- Yes. Give me a chance to really talk things over with her.

(Imitating Monkey Chattering)

- Now, don't forget to scratch. You're not scratching. You're not...

[...]