Greg Junior (called Greg Jr) is an imaginary child who Greg Heffley thinks of as his future son by an unknown woman (believed to be Holly Hills because of her looks) in Diary of a Wimpy Kid: Hard Luck. Greg imagines asking him if he'd like to pass a hot dog to "Mr. Rowley", thinking he would be the one everyone felt sorry for, although at the time, it was the other way around.


He looks just like a smaller version of Greg Heffley.




  • Many other imaginary children of Greg are seen in the books, but this is the only one with a said name.

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