- It's him. He's your Uncle Ira, alright.
- He is not.

5 seconds sound clip from the Invasion of the Body Snatchers (1956) movie soundboard.

You can hear this line at 00:10:46.194 in the Blu-ray version of the movie.

Quote context

[...]

- You be a good boy now go on, alright.

- Good bye, doctor.

- Good night.

- Sally, I've changed my mind. I'm not going directly home. I'm going to stop off and see Wilma Lentz.

- Should I call the boy's mother?

- Yes, call her and tell her what happened, and that I suggested it might be a good idea if the boy spend the night at his grandmother's house.

- Hello, Miles.

- Nice to see you, Wilma, Becky.

- Let's have it. You talked to him what do you think?

- It's him. He's your Uncle Ira, alright.

- He is not.

- How is he different?

- That's just it there is no difference you can actually see.

- He looks, sounds, acts, and remembers like Uncle Ira.

- Then he is your Uncle Ira.

- Can't you see that? No matter how you feel, he is.

- But he isn't. There's something missing.

- He's been a father to me since I was a baby. Always when he talked to me there was a special look in his eye. That look's gone.

[...]