Justin Tyler Berfield (born February 25, 1986) is a former American actor, writer, and producer. He is known for his portrayal of Malcolm's dimwitted older brother, Reese, on the Fox sitcom Malcolm in the Middle. He also played Ross Malloy on The WB sitcom Unhappily Ever After. As of 2010, Berfield is Chief Creative Officer of Virgin Produced, a film and television development, packaging, and production company announced in 2010 by the Virgin Group. Virgin Produced is based in Los Angeles, California.
Berfield was born in Agoura Hills, California, to Gail Berfield (née Stark) and Eric "Rick" Berfield. He is the younger brother of actor Lorne Berfield. Berfield is Jewish. He bought and then later sold the house previously owned by Newlyweds: Nick and Jessica stars Jessica Simpson and Nick Lachey.
Berfield's first screen appearance was in a Folgers coffee commercial at age five. He went on to appear in 20 other nationally broadcast American commercials as a young child. His TV debut came in the short-lived series The Good Life (1994) in which he co-starred with Drew Carey. More TV appearances followed in Hardball, The Boys Are Back, The Mommies (1994–95).