<P> Rowley has what Greg considers strange interests for his age and gender, such as liking a singer for "six - year - old girls" named Joshie and action figures Greg believes are for younger kids . Rowley is also the owner of the comic strip Zoo Wee Mama . Rowley claims that Greg had nothing to do with the comic strip in the first book, a rare antagonistic move from him . In the movie series, Rowley is portrayed by Robert Capron & Owen Asztalos . Rowley's shortest appearance was in The Long Haul, where he is only mentioned on one page . </P> <P> Francisco "Frank" Heffley is Greg's overreactive but well - meaning father . He is interested in U.S. history, and his replica of a Civil War battlefield is a plot point in the series . Frank is edgy around Rowley, does not appreciate Greg's skill at video games, loathes heavy metal, and adolescents . In Rodrick Rules, during Thanksgiving dinner, Frank turns up the thermostat to make everyone leave . He tries to toughen Greg up and threatens to send him to a military academy in The Last Straw, although ultimately this does not come to fruition, much to Greg's relief . However, Greg and Frank grow together in Dog Days . Frank is portrayed by Steve Zahn in the first three films of the Diary of a Wimpy Kid film series . In Diary of a Wimpy Kid: The Long Haul, he is played by Tom Everett Scott . </P> <P> Susan Heffley is Greg's mother . Though she is loving and motherly, she sometimes seems naive, absent - minded, embarrassing, and overprotective, apparently thinking she knows about what kids Greg's age are into when in fact, she doesn't . She doesn't like technology causing her to have the family to have their differences . She believes that technology is distant to her family . She also wants to become a good mother in front of her peers . She and her husband pays far more attention to Manny than their other two sons . She is portrayed by Rachael Harris in the first three films of the Diary of a Wimpy Kid film series . In Diary of a Wimpy Kid: The Long Haul, she is portrayed by Alicia Silverstone . In the online version of the first book, Susan was known as Ann Heffley . </P> <P> Manuel "Manny" Heffley is Greg and Rodrick's younger brother . He is an annoying, spoiled child who is constantly doted on by his mother . He makes a great number of demands and throws temper tantrums if they are not fulfilled . Among Manny's most well - known characteristics are his refusal to be toilet - trained and his complete inability to remain in nursery school . He frequently damages Greg's property, and uses his age as an excuse for doing so . Whenever they go on vacations, Manny ends up ruining it and gets away with it . The excessive coddling he receives from his parents infuriates Greg . He also takes advantage of his overindulgence . It is revealed in The Third Wheel that Manny has imaginary friends, whom he blames for his misbehavior . Despite his very young age and spoiled attitude, Manny shows signs of actually possessing more intelligence than he appears to have . He surprises his family by his ability to speak Spanish in The Long Haul, but plays this to his advantage by persuading some Mexican men to take them to retrieve their pet pig . He is his grandmother's favorite, although she denies this . In the three movies based on the first four books, Manny is portrayed by Connor and Owen Fielding . In the movie, Diary of a Wimpy Kid: The Long Haul, he is portrayed by Wyatt and Dylan Walters . </P>

Greg and rowley from diary of a wimpy kid