What Are Your Favorite (Old) Classic Films and/or Classic Movie Lines?

Are you a classic movie fan?

I am, and I love the Turner Classic Movie (TCM) channel.

I'm no film buff or expert by any stretch of the imagination, but classic films, especially those movies from the 30's, 40's and 50's, almost always draw me in.

My mother turned me on to the old movies from that era and I've been in love with many of them since I was just a kid.

Some of my favorites?

The African Queen, Casablanca, Lost Horizon, A Night at the Opera, and The Bridge on the River Kwai.

What are some of yours?

And what are your favorite classic movie lines?