Walder Frey

Lord Walder Frey is a character in Game of Thrones. He is played by David Bradley and debuts in the first season.

Walder Frey is the head of House Frey, a minor vassal house of the Riverlands sworn to House Tully.

In the books
In the Song of Ice and Fire novels, Walder Frey, the Lord of the Crossing, is an ancient (over 90), irascible and cranky old lord who rules over a vast brood of children, grandchildren, bastards, neices and nephews. His house has grown rich by building and maintaining the Twins, two castles that control the only crossing over the Green Fork of the River Trident for hundreds of miles. He is proud and haughty, but also crafty. He is known to his liege lord, Hoster Tully, as the 'Late Lord Frey' after delaying his arrival to assist Robert's Rebellion until the outcome had already been determined.