Classical music in movie "Babe"?

I watched this old movie Babe about a little pig. The musical theme in this movie I think is some classical composition.
It's also the melody of the song "If I had words to make a day for you..." You can hear it when the farmer is dancing.
Does anyone know what original classical piece of music this might be?

I found it, Symphony nr. 3 by Camille Saint-Saens. Thanks very much!!!

It is Saint Saens Symphony No.3 in C minor "Organ."

Here is page with soundtrack listing for the movie:

http://www.imdb.com/title/tt0112431/soun...

guess you can always find an answer to that kind of question on IMDb: http://www.imdb.com/

Sorry didnt know the answer, but such a Good feelin movie!

You already found the answer -- I'm too slow. But yes, Saint-Saens 3rd symphony is a wonderful piece!