The biggest challenge of Millie Alcock, shooting the movie “Dragon’s House”.

But the heat wasn’t the only problem for the actress, who exclusively told E! News that filming the series about riding dragons is not her “favorite thing”. The sequence required the actors to sit on a platform in front of a screen that projected scenery from the show in the background.

Millie wasn’t the only one House of the Dragon a star who had to get used to working with a dragon. Her colleague, Eva Best, who plays Princess Rhaenys Velarion, told E! News that she treated scenes riding a dragon.

“It’s a car and it moves and you have to move like you’re on a motorcycle, which I’ve never done before,” she noted. “You are tied with a belt, and the wind is blowing in your face. It’s pretty weird, but it was also really cute.”

House of the Dragon has already been renewed for a second season after the show broke records with its Aug. 21 premiere — according to the network, the debut episode saw the largest audience of any new original series in HBO history. The action unfolds 200 years before the events Game of Thrones, when House Targaryen ruled Westeros. In addition to Alcock and Best, the show stars stars Tom Glynn-Carney, Emma d’Arcy, Rhys Ifans, Emilia Carey, Olivia Cooke, Steve Toussaint, Fabien Frankel, Sonoya Mizuno, Paddy Considine and Matt Smith.