Mr. Brown is the father of Abigail Brown and he is the wife of Mrs. Brown. He appears when Greg goes to his house to pick Abigail up. He is also a state trooper, as he is dressed like one and has certificates of one and also has photos of him with other state troopers. He suffers from PTSD from his times as a state trooper.
- Diary of a Wimpy Kid: The Third Wheel (First and only appearance)