Jim Henson's Creature Shop has been behind most of cinema's biggest creature and puppetry endeavors. Their work has been part of Star Wars, Sesame Street, Hitchhiker's Guide to the Galaxy, Five Nights at Freddy's, and they're responsible for The Muppets. Jim Henson was the creator of The Muppets and directed every Muppet movie until his death in 1990 from streptococcal toxic shock syndrome after battling a severe case of pneumonia. His son, Brian Henson, then took over the company and directed his first film, The Muppet Christmas Carol.
Source：https://www.cbr.com/muppet-christmas-carol-ghost-creation/
