You can't just pick people for their hair color or the shape of their face. You have to go with the best actors.
George R. R. MartinCatelyn had never liked this godswood. She had been born a Tully, at Riverrun far to the south, on the Red Fork of the Trident. The godswood there was a garden, bright and airy, where tall redwoods spread dappled shadows across tinkling streams, birds sang from hidden nests, and the air was spicy with the scent of flowers.
George R. R. Martin