According to imdb.com , John Henson was active in the family business in the 1980s , 1990s and 2000s , perhaps most notably for his portrayal of Sweetums , a large , gruff-looking , lovable character on `` The Muppets . '' John dies at home at the age of 48 , the Jim Henson Company announces . He suffered a `` sudden , massive heart attack , '' according to the company . John was a shareholder , board member with the Jim Henson Company . His father helped develop `` Sesame Street '' , '' `` Sesame Street '' and `` The Muppets
John dies at home at the age of 48 , the Jim Henson Company announces . He suffered a `` sudden , massive heart attack , '' according to the company . John was a shareholder , board member with the Jim Henson Company . His father helped develop `` Sesame Street '' , '' `` Sesame Street '' and `` The Muppets