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