"There's a Great Big Beautiful Tomorrow" is the theme song to two Disney attractions, Walt Disney's Carousel of Progress at the Magic Kingdom of Walt Disney World (formerly at Disneyland) and Innoventions at Disneyland. It was also used in one scene of the Epcot attraction Horizons. History The song was written by Richard and Robert Sherman for the Carousel of Progress, one of four attractions Walt Disney and his Imagineers developed for the 1964 New York World's Fair. The lead vocals were by Rex Allen, a frequent Disney narrator who also provided the speaking voice for the Audio-Animatronic host of the attraction. When the Carousel of Progress moved to Disneyland after the fair and opened in 1967, the song came with it. In 1973, the Carousel of Progress closed and moved to the Magic Kingdom at Walt Disney World in 1975. During the move, in 1974, General Electric—the sponsor of the show—commissioned a new theme song known as "The Best Time Of Your Life", also written by the Sherman Brothers. In 1982, GE commissioned a third song from the Sherman Brothers called "New Horizons", but in the end, opted not to use it and GE's CEO wrote a song instead, which disappointed many fans of the attraction. When General Electric dropped sponsorship of Carousel of Progress in 1985, the newer song initially remained. But in 1993, Disney brought back the original theme, "There's a Great Big Beautiful Tomorrow," and renamed the attraction Walt Disney's Carousel of Progress. At that time, the song was rerecorded to feature the current voice cast, including Jean Shepherd (Speaking) and Jess Harnell (Singing) as the Father character, as can be heard on the theme park's web site. The song was also used in one scene of Horizons, the former Epcot "sequel" attraction to the Carousel of Progress. At Disneyland, the attraction that had replaced the Carousel of Progress, America Sings, closed in 1988. The building, known as the "Carousel Theater," sat empty for ten years, until the new Tomorrowland opened on May 22, 1998. The new occupant of the Carousel Theater building, Innoventions, paid tribute to the older attraction by reviving the 1964 song until it closed in 2015. Tom Morrow (the audio-animatronic host of Innoventions) sang it at the beginning, end, and during transitions of sets. This version of the song featured new lyrics written by the Sherman Brothers in 1998, and was sung