Mr. Harkin

"Sorry for that pal!"

—Mr. Harkin after going inside the bathroom when Greg was already using the seat.

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Mr. Harkin is a adult who was briefly mentioned and appeared in Diary of a Wimpy Kid: Cabin Fever. When Greg Heffley was four years old, Susan Heffley and Frank Heffley had a cocktail party and Mr. Harkin was invited to it. Harkin wanted to use the bathroom, so he opened the door, but Greg was already there using the toilet. Greg was young and did not know that people are supposed to lock. Harkin went away.Greg felt embarrased and went to his parents and told them what all happened.

Appearances

• Diary of a Wimpy Kid: Cabin Fever (first appearance)