Is Movie Popcorn Gluten Free?

I had the munchies last time I was at the movie theater... but I was a little to scared to buy a pottle of my own pop corn just in case it caused a reaction.

Can anyone tell me if certain cinemas use gluten free pop corn brands or if they have had any positive or negative experience with gluten in movie pop corn?

I would be fantastic to be able to have a treat like this when I went to the movies.. I guess I could bring my own, but there is something about buying it their.