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 Rupert Vansittart as Lord Yohn Royce Richard Rycroft as Maester Wolkan Ben Hawkey as Hot Pie Pilou Asbæk as Euron Greyjoy Bella Ramsey as Lyanna Mormont Rosabell Laurenti Sellers as Tyene Sand Jessica Henwick as Nymeria Sand Keisha Castle-Hughes as Obara Sand Tom Hopper as Dickon Tarly Tim McInnerny as Lord Robett Glover Megan Parkinson as Alys Karstark James Faulkner as Randyll Tarly Jim Broadbent as Archmaester Marwyn Harry Grasby as Ned Umber Ben Fox as Inn Customer #1 Mark Roper as Inn Customer #2