Angus Errol Sharon, Earl Kilwillie is a fictional character in the TV series Monarch of the Glen. He is portrayed by Julian Fellowes. Owner of Kilwillie Castle, Kilwillie is best known for being Hector Naismith MacDonald`s arch rival, but at the same time - best friend. Kilwillie and Hector are always getting into mischief. They were imprisoned f....