Sesame Street is an American educational children's television series and a pioneer of the contemporary educational television standard, combining both education and entertainment. Sesame Street is well known for its Muppets characters created by Jim Henson. It premiered on November 10, 1969, and is the longest running children's program on television. The show is produced in the United States by the non-profit organization Sesame Workshop, formerly known as the Children's Television Workshop (CTW), founded by Joan Ganz Cooney and Ralph Rogers. As a result of its extensive influence, Sesame Street is one of the most highly regarded, and most watched, educational shows for children in the world. The original series has been televised in more than 120 countries, and 25 independent versions have been produced. The show has been called "perhaps the most vigorously researched, vetted, and fretted-over program". As of 2009, the series has received 118 Emmy Awards, more than any other television series. An estimated 77 million Americans watched the series as children.