Fan Casting Will Parry in The Subtle Knife

Is the bearer of the Subtle Knife and a point of view protagonist of The Subtle Knife and The Amber Spyglass. He is the son of John Parry, an explorer, and of Elaine Parry, a woman who suffers from mental health problems. Will does not remember his father, a former Royal Marine, who has not been heard of since he vanished on an expedition to the Arctic when Will was an infant.