<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>
who plays manny in diary of a wimpy kid
Connor and Owen Fielding Wyatt and Dylan Walters