- Ha-ha-ha.
- I knew you'd laugh, but it's true all the same.

4 seconds sound clip from the The Picture of Dorian Gray movie soundboard.

You can hear this line at 00:03:31.535 in the Blu-ray version of the movie.

Quote context

[...]

- It's your best work, Basil. The best thing you've ever done.

- Of course, I can't believe that anyone is really as handsome as that portrait.

- Who is he? What's his name? Why are you being so secretive about it?

- It's a great painting. You ought to send it to the Grosvenor and let everyone admire it.

- I shall not send it anywhere.

- But why?

- I've put too much of myself into it.

- Ha-ha-ha.

- I knew you'd laugh, but it's true all the same.

- Well, there certainly isn't any resemblance between you and this young Adonis.

- You have an intellectual expression, and intellect destroys the beauty of any face.

- Don't flatter yourself, Basil. You're not in the least like him.

- Of course I'm not like him. And I'm glad of it.

[...]