“A boy needs a dog, Frank!”
―Joe talking to Frank about getting a dog.

Joe Heffley


Teenage Joe.png

Name Joseph Heffley
Age 40-42
Gender Male.png
Actor None
Film Appearance? No
Online Appearance? Yes
Book Appearance? Yes

Joseph "Joe" Heffley is the younger brother of Frank Heffley, brother-in-law of Susan Heffley, and paternal uncle of Greg HeffleyRodrick Heffley and Manny Heffley.


Role in Rodrick Rules

Joe comes to Greg's house late for Thanksgiving. His children all call their uncle "Aunt Fwank (Frank)." Susan says that this is cute but Frank says that Joe taught them to do that. When Frank goes down to the basement to do edits to his Civil War diorama, Joe sneaks down and says "Nice toys, big brother!" Frank explains everything to Joe, but Joe didn't listen to a single thing he was saying. Greg mentions that the year before that book takes place, Manny was approximately 2 weeks from getting out of diapers, but Joe puts a stop to it by saying "Watch out for the 'potty monster,' little fella!" Every-time time Frank had to change a dirty diaper at, he started cursing Uncle Joe under his breath!

Role in The Last Straw

Joe as a teenager

Joe makes a brief appearance on Easter at church. Greg says that when the songs start, he holds Greg's hands, even though he doesn't have to. Greg also says he has an iron grip. when they sat down Greg makes a cuckoo sigh to show he wasn't part of the holding hands to Holly and the rest behind him.

Role in Dog Days

Greg says he asked Joe to encourage Frank to buy a dog. Joe slaps Frank's back saying "A boy needs a dog!" Later he is at Greg's birthday party and his dog Killer eats some of Greg's birthday cake.

Role in The Ugly Truth

He and his brother Frank are trying to get Greg to be more responsible and not end up like their brother Gary Heffley. He appears at Gary's fourth wedding and the Heffley family reunion.


Uncle Joe is evidently one of the more troublesome character in the series, who inadvertently embarrasses, annoys and harms Frank by causing him lots of pain and disgust. Uncle Joe is classified as very immature, childish, and overly-affectionate. However in The Ugly Truth, he does teach Greg how to be more responsible in the future, most likely so that Greg won't end up like Uncle Gary. This may imply that Joe has a sense of responsibility and wants what's best for his nephew.


Uncle Joe is shown having a Mexican-style mustache, black hair and western-style clothing, looking more like a cowboy in Greg's illustrations. Even though he appears to be designed like a teenager.


Frank Heffley

Frank is Joe's brother whom despises Joe who often makes fun of him. Joe convinced his kids to call Frank "Aunt Fwank", much to Frank’s annoyance.

Gary Heffley

Not much is know about is Joe's relationship with his younger brother Gary Heffley, though it is better then Frank’s.


  • In a flashback in Cabin Fever, when Greg snuck into his mother's email account to tell everyone to coordinate all of the Christmas presents they will get Greg, Joe's name can be seen.
  • He may have been born in 1967.
  • In the first movie, Greg is the one to tell Manny about 'The Potty Monster', not Uncle Joe.


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