Despite the bad writing of the final season and the questionable conclusion, HBO’s Game of Thrones was still one of the most successful TV series in history, and many fans have lamented the fact that the show has come to an end.

White Saviour Theme In Game Of Thrones Photo Sourc
Game of Thrones was still one of the most successful TV series in history

To ease their minds, the producers have said on multiple occasions that they have several prequels planned. Now, according to a report from Entertainment Weekly, the most well-known one of those prequels – the one starring Naomi Watts and revolves around the Long Night – has begun filming. Currently, the production crew is allegedly in Northern Ireland, where a large part of the mainline Game of Thrones was shot.

It’s also important to note that at the moment, only the pilot episode of the prequel is in the works. Whether or not HBO decides to make it a complete series depends on how successful this pilot is.

Game Of Thrones Northern Ireland
A large part of Game of Thrones was filmed in Northern Ireland

As you might remember, the pilot episode of Game of Thrones encountered a lot of problems and had to undergo extensive re-shoots, with multiple major characters such as Daenerys Targaryen and Catelyn Stark having to be re-casted. Before they went to Emilia Clarke and Michelle Fairley, those roles were played by Tamzin Merchant and Jennifer Ehle respectively.

An HBO spokesperson told CNET that it has "not confirmed production" of the prequel yet, and the article from Entertainment Weekly is just speculation “based on other reports."

The role of showrunner for the prequel went to Jane Goldman, who previously wrote the script for several notable movies including X-Men: First Class and Kick-Ass. The pilot episode is helmed by S.J. Clarkson, who directed the Jessica Jones TV series.

The Long Night Game Of Thrones Prequel White Walke
The events of the prequel will focus on the Children of the Forest and the White Walkers

The prequel will likely be named “The Long Night”, and its events will take place thousands of years before Game of Thrones. As a result, we probably won’t see any familiar characters make a return.