Game of Thrones fans can now sit on the Iron Throne – if they can find it, that is.

HBO has hidden the coveted chair somewhere in the world and wants the show’s feverish fanbase to go out looking for it.

The American network launched the #ForTheThrone campaign yesterday, posting an hour-long video of the Iron Throne sat in a forest on YouTube.

On the campaign’s official website a countdown has begun ticking down, alongside a message asking fans to “claim the throne before time runs out”.

When someone does take a seat on that throne, another throne will appear somewhere in the world and, presumably, another mysterious video will be posted, hinting at its location. There are six in total.

HBO has previously used #ForTheThrone to advertise the upcoming eighth season of Game of Thrones, having posted 20 posters online with the hashtag on Twitter. Each poster features a different major character on the Iron Throne.

Game of Thrones season 8 posters Show all 20 1 /20 Game of Thrones season 8 posters Game of Thrones season 8 posters The Night King Game of Thrones season 8 posters Emilia Clarke as Daenerys Targaryen Game of Thrones season 8 posters Maisie Williams as Arya Stark Game of Thrones season 8 posters Nathalie Emmanuel as Missandei Game of Thrones season 8 posters Alfie Allen as Theon Greyjoy Game of Thrones season 8 posters Iain Glen as Jorah Mormont Game of Thrones season 8 posters Kit Harington as Jon Snow Game of Thrones season 8 posters Conleth Hill as Varys Game of Thrones season 8 posters Nikolaj Coster-Waldau as Jaime Lannister Game of Thrones season 8 posters Jacob Anderson as Grey Worm Game of Thrones season 8 posters Carice van Houten as Melisandre Game of Thrones season 8 posters Lena Headey as Cersei Lannister Game of Thrones season 8 posters Rory McCann as Sandor "The Hound" Clegane Game of Thrones season 8 posters Pilou Asbæk as Euron Greyjoy Game of Thrones season 8 posters Peter Dinklage as Tyrion Lannister Game of Thrones season 8 posters Gwendoline Christie as Brienne of Tarth Game of Thrones season 8 posters John Bradley as Samwell Tarly Game of Thrones season 8 posters Sophie Turner as Sansa Stark Game of Thrones season 8 posters Liam Cunningham as Davos Seaworth Game of Thrones season 8 posters Isaac Hempstead Wright as Bran Stark