CBBC Newsround Online has one of the first pictures of the Quidditch World Cup from the set of the Goblet of Fire.
The photo shows the village of tents that has been specially built at Leavesden Studios, outside London.
According to the News of the World, they've also built a big grandstand, ancient buildings and a dragon's lair.
Filming of the Goblet of Fire is expected to go on until spring and it's thought to be one of the most expensive films ever, costing a huge £171m!