Guest Stars Jacob Anderson as Grey Worm Hafþór Júlíus Björnsson as Ser Gregor Clegane Anton Lesser as Qyburn Diana Rigg as Lady Olenna Tyrell Gemma Whelan as Yara Greyjoy Ellie Kendrick as Meera Reed Rupert Vansittart as Lord Yohn Royce Richard Rycroft as Maester Wolkan Staz Nair as Qhono Pilou Asbæk as Euron Greyjoy Rosabell Laurenti Sellers as Tyene Sand Sara Dylan as Hand Maid Tom Hopper as Dickon Tarly James Faulkner as Randyll Tarly Mark Gatiss as Tycho Nestoris Jim Broadbent as Archmaester Marwyn Brendan Cowell as Harrag Luke Wilson Hanley as Ironborn Sailor