John Henson -- a son of the late, great children's entertainment visionary Jim Henson -- died after a "sudden, massive heart attack," his family's company said. 

The Jim Henson Company announced the death of the 48-year-old son of its iconic founder in a Facebook post Saturday. 

He died Friday while at home with one of his two daughters, the post said. John Henson is also survived by his wife, Gyongyi, and his siblings Lisa, Cheryl, Brian and Heather. 

Two other members of his family had top jobs in their father's namesake company, with Brian Henson as chairman and Lisa Henson as CEO. John Henson is listed prominently as one of five members of "the Henson family" on the company's website. 

John Henson served as a shareholder and board member of The Jim Henson Company. 

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." 

His father, Jim, died suddenly in 1990, after a celebrated career in which he launched shows like "The Muppets," "Fraggle Rock" and created beloved characters from "Sesame Street" such as Big Bird, Elmo, the Cookie Monster and Oscar the Grouch. 

Last April, John's mother, Jane Nabel Henson -- who met Jim in a puppetry class at the University of Maryland in 1954 and married him five years later -- died at the age of 79 after a "long battle with cancer." 

Jane Henson dies of cancer 
Who is John Henson?
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Is his dad still alive?
When did he die?
What was his dad famous for?
Which ones?
Any others?
Did he create Oscar the Grouch?
Is John's mother still alive?
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when was that?
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Was John working in the family business?
What was he most known for?
Jim Henson's son
a son of the late, great children's entertainment visionary Jim Henson
died
 died
heart attack
heart attack
48-year-old
48-year-old
his family's company
his family's company
Saturday
Saturday
Facebook post
Facebook post
No
His father, Jim, died suddenly in 1990
1990
1990
Created TV shows.
celebrated career in which he launched shows like "The Muppets," "Fraggle Rock" and created beloved characters from "Sesame Street" such as Big Bird, Elmo, the Cookie Monster and Oscar the Grouch
"The Muppets," "Fraggle Rock"
"The Muppets," "Fraggle Rock"
"Sesame Street"
"Sesame Street"
Yes
Oscar the Grouch
No
died at the age of 79 
long battle with cancer
long battle with cancer
puppetry class
puppetry class
1954
1954
University of Maryland
University of Maryland
Yes
John Henson is listed prominently as one of five members of "the Henson family" on the company's website.
Sweetums
Sweetums