Rowley Jefferson is characterized to be Greg's best friend. He is 12 years old and is shown to play pranks in Greg's point of view while technically in a third-person view. Rowley is depicted as a friendly and good-natured but naive boy who sticks with Greg despite the latter getting him into trouble on multiple occasions. At the end of Diary of a Wimpy Kid: The Third Wheel, Rowley begins dating Abigail Brown, a girl who was originally Greg's date for the Valentine's Day dance. This plot continues in Diary of a Wimpy Kid: Hard Luck, where he ditches Greg for his new girlfriend Abigail. At the end of the book, the couple breaks up and he becomes friends with Greg again. Rowley is into pop star, Joshie, who apparently is for six-year-old girls. Rowley is sometimes very dumb, but Greg doesn’t care. When Rowley gets a diary for his birthday, Greg is angry. After finding out that Rowley asked his parents for a diary so he could be just like Greg (and after saying he and Greg can be the "Diary Twins"), Greg give him a little punch in the shoulder to show that he is not at all impressed.