Arthur Heffley

Arthur Heffley is Greg's Great Uncle. He cannot talk but instead grunts, wimpers and makes other noises. He is not married, making him one of Gammie Heffley's"Bachelors". He is almost bald and wears glasses. He almost always wears a tie, like Grandpa Heffley. He sleeps with Greg's brother, Rodrick Heffley when sleeping over at Gammie's house. He makes his debut in the Ugly Truth. Greg has speculated he may be attempting to communicate and as a result occasionally responds.