No, it's too late. The engagement's off. I won't marry into a family with a black sheep.

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

You can hear this line at 00:14:35.809 in the Blu-ray version of the movie.

Quote context

[...]

- Any skeletons in the closet?

- You mean to say Julia hasn't told you about Grandfather?

- No.

- He stole a railroad from the stockholders.

- Now, that's not true.

- And of course you've heard about me. I'm the black sheep.

- Baaa!

- That's a goat.

- Johnny, don't pay any attention to her.

- No, it's too late. The engagement's off. I won't marry into a family with a black sheep.

- I think I like this man.

- Hello.

- Well, you'll see him at lunch.

- Bye-bye, darling. We've got to fly.

- See you at lunch, sis.

- Sing, choirs of angels, sing in exultation.

[...]