Dame Diana Rigg’s former Game of Thrones colleagues ... character Olenna Tyrell. Olenna was the sharp-minded (and equally sharp-tongued) matriarch of the powerful House Tyrell.

The Reach: A former sovereign nation ruled over by House Tyrell from Castle Highgarden before the Conquest of King Aegon. Who is in the cast of Game of Thrones and where have we seen them before?