John Henson, the son of Muppets creator Jim Henson, died suddenly on Friday. He was 48.
The Jim Henson Company shared the sad news on their Facebook page on Saturday.
"It is with great sadness that we confirm that John Henson, son of Jim and Jane Henson and brother to Lisa, Cheryl, Brian and Heather, died at age 48 of a sudden massive heart attack on Friday, February 14, while at home with his daughter," the statement read.
"John served as a shareholder and board member of The Jim Henson Company. He leaves two daughters, Katrina (15) and Sydney (10) and his wife Gyongyi. A private service is being planned."
According to IMDB, John was also a puppeteer and provided the voice for the large hairy ogre Sweetums.
His father Jim passed away in 1990 at the age of 53 and his mother Jane Henson died last spring at the age of 78.
John's parents met in a puppetry class at the University of Maryland in 1954, and the two worked together to eventually bring such iconic characters as Kermit the Frog, Miss Piggy and Big Bird (just to name a few, of course) to life. The couple married in 1959 but became legally separated in 1986.