New ‘House of the Dragon’ Set Leaks Reveal Stunning King’s Landing and Grand Sept Details

The third season of House of the Dragon started filming a while ago and we’ve already had the opportunity to see various sets thanks to leaked set images and videos.

Now the latest set leaks brought to us by UnBoxPHD showcase what appears to be King’s Landing set and the Grand Sept.

The Grand Sept can be seen in the video below:

It appears that the production is rebuilding the sets seen in the first two seasons. Filming for season three started on March 21, 2025, at Leavesden Studios in Watford. It will continue until October.

Previous set leaks showcased the entire town built from scratch, which is presumably Tumbleton, and an entire ship was moved to the location to film The First Battle of Tumbleton.

Have something to add? Let us know in the comments below!