India, Oct. 13 -- RJ Mitte, the actor and disability rights advocate who played Walter White Jr on Breaking Bad, has died at 34. He is best known as the son of Bryan Cranston's character.

Mitte died Monday in Brownsville, Texas, his reps announced. In a statement, they said, "It is with profound sadness that we share the tragic passing of beloved actor, philanthropist and passionate disability rights advocate R.J. Mitte."

County official told TMZ that RJ has died by possible suicide.

Before Breaking Bad, Mitte was an unknown teen actor. In 2007 he got his first small-screen acting credit as an extra on Hannah Montana.

He appeared in an episode titled "Schooly Bully," in which Miley Cyrus' character is picked on by a new girl. Mitte wa...