Manny Heffley

"I'm onwy thwee!"

- Manny after putting a cookie in Greg's console.

Emmanuel "Manny" Heffley is the younger brother of Rodrick and Greg Heffley who is constantly pampered and spoiled by his parents. As the youngest child of the Heffley family, he plays a major role in the Diary of a Wimpy Kid series, having appeared in all of the main series books to date.

He is played by identical twins Connor and Owen Fielding in the first three Diary of a Wimpy Kid film adaptations and triplet brothers Dylan and Wyatt Walters in the Long Haul movie. He is also voiced by Gracen Newton in the animated adaptation. He is the main antagonist of Diary of a Wimpy Kid: Cabin Fever.

Appearance
Manny looks like a small kid with three hairs, and rabbit-like teeth and wears a white shirt, black shorts, and white shoes. He is the youngest and shortest Heffley family member. In Diary of a Wimpy Kid: The Long Haul (2017 film), Manny has curly red hair, a blue shirt, and beige shorts.

Personality
Manny Heffley is a selfish and spoiled toddler who, if he does not get his way, will do things such as removing all of the electricity in the house except for his room, as shown in Cabin Fever. Greg believes that his, Rodrick‘s, and Manny’s parents treat Manny like a prince, but that is far from the truth as they treat him this way out of fear of what he will do to them. He watches a show called "The Snurples," which according to a newspaper sets kids back in social skills and language development (Manny starts speaking gibberish). He has never been a protagonist. Manny has shown that this is true - he has no real friends and never plays with other kids in playgroups, but has imaginary ones and uses these to get out of trouble and get extra food, etc. Despite his seemingly air-headed exterior, Manny has shown that he can be very cunning, deceitful, manipulative, and intelligent for his age in unexpected ways. When Susan let him play on Greg's Net Kritterz account, he figured out how to sell all of his brother's items and change his password. He has also locked out the entire family from watching any TV shows except for his personal favorite cartoons. He also has been shown to speak Spanish in The Long Haul.

Manny has also been characterized as extremely uncaring and holds powerful grudges that have endangered the family on multiple occasions. One of these is shown in Cabin Fever, where he shuts off all the lights as well as the air conditioning to every room except his own just because he wasn't taught how to tie his shoes. This caused the entire family to suffer in cold weather and starvation until Greg finally discovered the scandal.

Manny's unusual personality can however significantly help the Heffley family as a whole. Manny can speak Spanish properly, and that's just from listening to hours of Spanish-English wordbook-CD that his mother borrowed from the Spanish library. He also has an extreme ability to learn new things and abilities, which again, is shown when he learns to speak proper Spanish after just a few hours. In The Deep End when Susan allowed Manny to put the last piece in the puzzles, he uses this knowledge at the end of the book to steer the RV into the gap of the broken bridge allowing everyone to leave Campers' Eden.

The fact Manny is able to learn perfect Spanish, change Greg's password and the parental lock, kill all the lights except for his room, build a house using only scrap wood and a toy toolbox, and steer an RV to fix a broken bridge is quite surprising for a child his age, meaning he is quite intelligent but however, is still socially awkward.

It is likely that Manny knows about his parents' favoritism towards him, and he takes advantage of this. This includes breaking Greg's gaming console, drawing on his bedroom door, taking a dirty magazine to daycare, and twisting the "No Swearing" rule in such a way that he makes money out of it.

Manny also gets anything and everything he wants, and his parents trust his lies to Greg and Rodrick, so they end up getting grounded, even though Manny deserves it.

Quotes

 * "BUBBY!"
 * "BWAH HA HA!"
 * "I'm ownwy thwee!"
 * "I'm sowwy, bubby."
 * "Wood you wike some chokwits?"
 * "Bubby thowed wock at big window."
 * "Ploopy!"
 * "Pour my dwink, Ploopy!"
 * "Wipe my heinie ploopy!"
 * "QUACK! QUACK!"
 * "Tingy says your going to have an accident."
 * "Snake Road."
 * "Busted."

Trivia

 * In the first book, after he yells "Bubby" at Greg on the stage, Greg says he's been able to keep that nickname quiet for 5 years, meaning Manny must be around 6. However, this is the only time he's been suggested to be an age other than 3, as in later books and the films he's suggested to be three.
 * In Rodrick Rules, Greg says that even though Manny drives him crazy, Rodrick has been using Manny instead of Greg to help sell chocolate bars for his school's fundraiser since he started to talk which Greg is grateful for.
 * In the online version, Manny is allergic to peaches. Greg also implies this in The Ugly Truth.
 * The only members of the family who do not appear to like him are Aunt Cakey, Greg Heffley, and Rodrick Heffley.
 * Manny is quite smart, as he knows how to change the password to both Greg's Net Kritterz account, and the TV parental locks so he can watch whatever he likes, whenever he likes. He can also speak perfect Spanish and the Snurples language fluently and relatively quickly.
 * Manny loves Bitter Apple Spray, so he probably likes sour and bitter food.
 * According to The Wimpy Kid Movie Diary, the main reason the producers picked twins was that they felt that twins would be easier to work with (on account that there would be a backup should one refuse to cooperate).
 * Manny seems to be fond of keeping random animals as pets. In The Long Haul, he is attached to The Pig and repeatedly attempts to get him back. In The Getaway, he attempts three times to keep wild sea animals as pets: first with hermit crabs and snails, second with a baby sea turtle, and third with a Box Jellyfish. Surprisingly, in The Meltdown, he doesn't seem too concerned with the pig being lost and forgets about it.
 * He may be modeled after Igdoof's little brother.
 * Manny got brand new things when he was a baby, like pacifiers, and his bed looked even newer than Rodrick's.
 * Jeff Kinney said that he gave Manny his name because he originally didn't know it was short for Emmanuel. Rather, he thought it was meant to be an ultra-masculine name. "So, I wanted to have this tiny boy have this over-masculine name".
 * Manny barely appears in Double Down and only makes a few cameos.
 * Manny's hairstyle is very similar to Greg's.

Appearances

 * Diary of a Wimpy Kid (online)
 * Diary of a Wimpy Kid
 * Diary of a Wimpy Kid (2010 film)
 * Diary of a Wimpy Kid: Rodrick Rules
 * Diary of a Wimpy Kid: Rodrick Rules (2011 film)
 * Diary of a Wimpy Kid: The Last Straw
 * Diary of a Wimpy Kid: Dog Days
 * Diary of a Wimpy Kid: Dog Days (2012 film)
 * Diary of a Wimpy Kid: The Ugly Truth
 * Diary of a Wimpy Kid: Cabin Fever
 * Diary of a Wimpy Kid: The Third Wheel
 * Diary of a Wimpy Kid: Hard Luck
 * Diary of a Wimpy Kid: The Long Haul
 * Diary of a Wimpy Kid: The Long Haul (2017 film)
 * Diary of a Wimpy Kid: Old School
 * Diary of a Wimpy Kid: Double Down
 * Diary of a Wimpy Kid: The Getaway
 * Diary of a Wimpy Kid: The Meltdown
 * Diary of an Awesome Friendly Kid: Rowley Jefferson's Journal
 * Diary of a Wimpy Kid: Wrecking Ball
 * Diary of a Wimpy Kid: The Deep End
 * Diary of a Wimpy Kid: Big Shot
 * Diary of a Wimpy Kid: Class Clown
 * The Wimpy Kid Movie Diary
 * The Wimpy Kid Do-It-Yourself Book
 * Wimpy Wonderland
 * Diary of a Wimpy Kid (2021 film)