Game of Thrones Star Joins Legacy of Valor Cast

In a new press release from the folks at Black Banner Studios, it has been revealed that Hafthor Júlíus Björnsson, who you might recognize best as the towering Ser Gregor Clegane from HBO’s Game of Thrones, has joined the cast of Legacy of Valor. The team unveiled this appointment ahead of Poznań Game Arena 2026, which is set to kick off on October 23. While the show is live, Black Banner will host a main-stage presentation, offer demo opportunities, and allow visitors to meet Björnsson.