Roy Frank "RJ" Mitte III (born August 21, 1992) is an American actor, producer, and model. He is best known for his role as Walter "Flynn" White Jr. on the AMC series Breaking Bad (2008–13). Like his character on the show, he has cerebral palsy. After moving to Hollywood in 2006, he began training with personal talent manager Addison Witt. They sought acting opportunities where his disability would serve to educate viewers, which led him to audition for the role in Breaking Bad.
Mitte was born in Jackson, Mississippi. He was delivered by emergency caesarian and was not breathing at the time of his birth, which resulted in permanent brain damage. He was adopted a few weeks later by Roy Frank Mitte Jr. and Dyna Mitte, who later separated. He was diagnosed with cerebral palsy at the age of three, and doctors put his legs in casts for six months in an attempt to straighten his feet.
Mitte was fitted with leg braces and used crutches throughout most of his childhood; however, over time, his body became stronger through sports and exercise, he no longer needed any walking devices by the time he was a teenager. In 2006, he moved with his family to Los Angeles, where his younger sister Lacianne Carriere had received an offer for a role in a film project.