Jim Henson (created many Muppets)

Jim Henson created many Muppet characters for the purpose of appearing on Sesame Street. His involvement with the show began when he and one of the creators, Joan Ganz Cooney, met in the summer of 1968 at one of the show's five three-day curriculum planning seminars in Boston. Author Christopher Finch reported that director Jon Stone, who had worked with Henson previously, felt that if they could not bring him on board, they should "make do without puppets".