Rowley Jefferson is Greg's best friend appearing in Diary of a Wimpy Kid. He has brown hair and black eyes. His main outfit is composed of: a blue long sleeved shirt, blue jeans and brown shoes. He is voiced by Tom Kenny. At his age, he is 14 years old. At his prom dance with Chloe, his prom outfit is composed of: a white tuxedo, white pants and white shoes.
- Betty Jefferson (Mother)
- Hubert Jefferson (Father)
- Callie Jefferson (Younger Sister)
- Tiffany Jefferson (Older Sister)
- Chloe Garcia (Love Interest)