For the kid who made monkey noises at Greg, see Cecil Warner
Uncle Cecil is Greg's adoptive uncle that is only 3 or 4 years old according to Greg. He was adopted by Greg's Great Aunt Marcie. Although he is only a toddler, he is considered an adult as he sits in the dining room with adults, even though Rodrick has to sit with kids.
- Diary of a Wimpy Kid: Hard Luck (First and only appearance)