Starcastle is an American progressive rock band from Champaign, Illinois, United States. Formed in 1969, the group played many shows under the names Pegasus and Mad John Fever before eventually settling on Starcastle. They signed their first record deal with Epic Records in 1974, and received extensive airplay and frequently played in the St. Louis area. The original lineup included former REO Speedwagon vocalist Terry Luttrell and computing author/programmer Herb Schildt. They released four albums on both the Epic and CBS labels. The band's debut album Starcastle sold well, garnering worldwide airplay.
Their later albums Fountains of Light, Citadel, and Real to Reel did not sell as well as the first and they were often criticized for sounding too musically similar to Yes. They were opening acts for such bands as Jethro Tull, Gentle Giant, Fleetwood Mac, Kansas, Boston, Rush, Journey, and others. After several line-up changes, the band went on a ten-year hiatus from 1987.
In 2002, Gary Strater, Steve Tassler and Steve Hagler all released solo albums on the band's own Sunsinger label.