Billy Robbins was the worlds heaviest teenager weighing over "60 stone" or 840 pounds at 19 years old. He has had several television documentaries about his struggles with loosing and in some gaining back his weight. He has appeared on TLC Specials entitled Half Ton Teen, and Half-Ton Dad. His weight has been the trademark for his credentials listed on this IMDB page. Morbidly obese and practically immobile at and only at the time of filming Half Ton Son 19 years old.