Breaking Bad actor RJ Mitte's demise at the age of 34 has left fans and co-stars in shock. Bryan Cranston, who played his father in the popular crime drama, paid a heartfelt tribute to his co-star, remembering his journey and reflecting on their years collaborating.

Bryan Cranston mourns loss of his Breaking Bad co-star RJ Mitte

Sharing a picture from their time together, he wrote an emotional note that read, "I’m in deep despair as I write this tonight. RJ Mitte, my sweet son on Breaking Bad has died. I met him when he was only 14 years old when he was cast as Walter White Jr., a part he played with such joy and enthusiasm. Born with Cerebral Palsy, he never - ever - allowed that challenge to be an excuse for anything. He met the demanding shooting schedule head on with great determination."