Lady Olenna Tyrell, née Redwyne, is a recurring character in the third, fourth, fifth, sixth and seventh seasons. She is played by Dame Diana Rigg. The elderly matriarch of House Tyrell, Lady Olenna has been a master of court politics and intrigue par excellence throughout her life. She's also known for her wit and sarcasm. As a result, Lady Olenna is popularly nicknamed the Queen of Thorns, in reference to the Tyrell sigil - a rose - and her cutting barbs. In many ways she is the de facto head of House Tyrell at the time of the War of the Five Kings and appears to hold a great deal of influence over the Reach.