He said the fight was down to a “buildup of frustration” on the part of William who was told “a lot of stories” about Meghan and Harry by his office and the tabloid press.
Harry also said William grabbed his collar after their grandfather Prince Phillip’s funeral in April 2021.
He wrote in Spare that his father pleaded for the pair of them not to make his life a “misery”.
Good Morning America asked Harry whether he felt his book would bring the family together or tear them apart. The Prince said: “I thought about it long and hard, and as far as I see it the divide couldn’t be greater before this book.”