Began acting at the age of six with auditioning and landing small roles in commercials and television until he landed his breakout role in 3rd Rock from the Sun (1996).
Joseph Gordon-Levitt is a teetotaler and does not smoke or drinks alcohol.
Always wears colorful, mismatched socks as a tribute to his late brother.
He has said that he has been told many times by producers that he needed to pack on some weight because he appeared “too skinny” on screen. He did bulk up recently, but only to more greatly resemble a young Bruce Willis in their film Looper (2012).
