| First Name | Justin |
| Middle Name | Tyler |
| Last Name | Berfield |
| Full Name at Birth | Justin Tyler Berfield |
| Other Names | The Commercial Kid |
| Age | 25 |
| Date of Birth | February 25, 1986 |
| Birthplace | Los Angeles County, CA |
| Height | 5' 10" (178 cm) |
| Build | Average |
| Eye Color | Green |
| Hair Color | Brown - Dark |
| Star Sign | Pisces |
| Religion | Jewish |
| Ethnicity | White |
| Nationality | American |
| Occupation Category | Actor |
| Claim to Fame | Malcolm in the Middle |
| Official Website | officialjustinberfield.com |
| Father | Rick Berfield |
| Mother | Gail Berfield |
| Brother(s) | Lorne Berfield |
| Favorite Movies | American PieDeuce Bigalo Male GigaloAustin Powers 2 |
| Favorite Bands | Dr. DreEminemJay Z |
| Favorite Foods | SushiPizzaIn-N-Out BurgerSprite |
| Favorite Colors | Red, Yellow, Blue, Green |
Justin Tyler Berfield (born February 25, 1986) is an American actor, writer and producer, best known for his portrayal as Malcolm's 2nd-oldest brother, Reese, in Malcolm in the Middle. He also starred on The WB sitcom Unhappily Ever After as Ross Malloy.
Selected Justin Berfield film and TV show credits: