There's a 10-minute mini documentary that will give you some insight. It's called...wait for it...Watch The Throne documentary. Most vimeo and youtube links from blogs have been taken down but I'm sure you can find a working link.
Also, it's pretty dope to see them kick it with Russell Crowe in Australia. It's such boss shit. I know rappers have been kicking it with movie stars since the early days but it's still cool to see celebs out of their element among Black rappers.