I assume you mean Disney movie rewards ?
I'm pretty sure they operate in several different territories, at least definitely in the USA, Canada and the UK. If the leaflet for disney movie rewards is in the box in the territory you buy it in, it should be valid in that country. Just make sure you go to the right website, (e.g. Disney movie rewards UK instead of US)
I've never really used it before though so I don't know what sort of things you can get outside of the US or if they're the same.
Edit: Just had a look, and most of the UK stuff is just DVDs
There was a really awesome looking TLK competition but it was from 2011 and only valid in the US unfortunately