Well, I was going to tell you about this before, but I wanted to wait until it was definite.
5 seconds sound clip from the Meet Me in St. Louis (1944) movie soundboard.
You can hear this line at 01:09:49.079 in the DVD version of the movie.
Quote context
[...]
- Why, Lonnie, what a lovely box...
- Just because I bring you a present, you think I've been up to something. Well, I have.
- Now, Anna, I have some good news. Don't fly up in the air. There's nothing to lose your head over.
- I don't know what you're talking about.
- I'm as cool as a cucumber, and you're shaking like I don't know what.
- Well, I was going to tell you about this before, but I wanted to wait until it was definite.
- The firm is sending me to New York.
- Well, I think we can live without you for a while.
- They'll all be safe with me. I've got 12 guns in my room.
[...]