Gregory "Greg" Heffley is the main character of the Diary of a Wimpy Kid franchise. In the live-action film series, he was portrayed by Zachary Gordon in the first three films, then successor Jason Drucker in the fourth film.

He is the middle child of the Heffley family, son of Frank and Susan; and brother of Manny and Rodrick. He is best friends with Rowley Jefferson, and he and Rowley attend Westmore Middle School as students.

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