Olivia Cooke attended the world premiere of "House of the Dragon" Season 3 on a red carpet in London [1, 3].

The event marks the promotional launch of the HBO series' third season, bringing the cast together to engage with fans and media before the new episodes air [3, 1].

Cooke appeared at the venue in Leicester Square wearing a ballgown designed to evoke her character, Queen Alicent Hightower [1, 2, 3]. The fashion choice served as a visual nod to the royal aesthetics of the series, bridging the gap between the actress's public appearance and her role in the fictional realm of Westeros [1].

Other cast members were present to discuss the upcoming narrative direction of the show. Matt Smith said he addressed the anticipation surrounding the adaptation of George R. R. Martin's work [2].

"Everyone has their own opinion, particularly on George [R. R. Martin]'s work. But it's completely about the fans. I hope it delivers," Smith said [2].

Gayle Rankin also provided a brief glimpse into the tone of the new season. Rankin said Alys would describe the third season as "hot" [2].

The premiere gathered the ensemble cast in central London to celebrate the return of the high-stakes political drama [1, 2]. The red carpet served as a primary marketing tool for the network to generate momentum for the season's release [3, 1].

Olivia Cooke appeared at the venue in Leicester Square wearing a ballgown designed to evoke her character.

The use of character-inspired fashion at high-profile premieres is a strategic branding effort by HBO to maintain immersion in the series' lore. By aligning the cast's red-carpet presence with the visual identity of the show, the network strengthens the connection between the actors and their roles, fueling fan engagement and social media visibility ahead of the season premiere.