According to The Hollywood Reporter, Game of Thrones: The Last Watch will be feature length, clocking in at two hours, and will air on 26 May, a week after the final episode.
A Game of Thrones documentary will air after the series finale of the show.
Game of Thrones‘s eight and final season begins on HBO on 14 April.
Directed by Jeanie Finlay, it will deal with the making of the final season, drawing on Finlay’s experiences while being on the set for a year.