Smith will be portraying the role of Prince Daemon Targaryen, the younger brother of Considine’s King Viserys.
According to Deadline, Emmy-nominated actor Matt Smith have officially been tapped for the leading roles in HBO’s upcoming Game of Thrones prequel series House of the Dragon.
The series will shoot primarily in England, moving from Game of Thrones’ main-based location in Belfast, Northern Ireland.
Meanwhile, D’Arcy is set to portray Princess Rhaenyra Targaryen, the king’s first-born child who is of pure Valyrian blood and is a dragonrider.