Margaery Tyrell is a major character in the second, third, fourth and fifth seasons. She is played by Natalie Dormer and debuts in "What is Dead May Never Die." Queen Margaery Tyrell is the widow of King Renly Baratheon, a claimant to the Iron Throne in the War of the Five Kings. Her father Lord Mace Tyrell is the ruler of the Reach. She is betrothed to King Joffrey Baratheon after the Battle of Blackwater, and briefly becomes his queen, but this is cut short when Joffrey is fatally poisoned at their wedding feast. She has subsequently become betrothed to Joffrey's brother and successor, Tommen Baratheon. Margaery is known for her beauty, political cunning, and ambition, although she has a compassionate side.