In 1987, after several years of making a living as a musician in Los Angeles, Guy Babylon met Davey Johnstone while doing some session work. This turned out to be a pivotal meeting in his career, because a year later, Davey called Guy and told him Elton John was looking to add an additional keyboard player to his band. Guy's first live performance with Elton was in July 1988 for a benefit at the Century Plaza Hotel in Los Angeles. In 1989, Guy embarked on his first world tour as part of the Elton John Band.

Guy was born on December 20, 1956 in New Windsor, Maryland. He attended Francis Scott Key High School and continued his education with an athletic scholarship at the University of South Florida. Six months after graduating with a BA in music composition and theory, he moved to California and joined up with the band Iron Butterfly. After a year or so of that, he went his own way, composing music for radio and television, doing demo work and putting together a home studio.

In the March 1987 issue of Keyboard magazine, Guy was announced as the winner of the 2nd Annual Reader Tape Contest with his entry, "Babylon Bleu," and was highlighted in a feature article. The next step in Guy's musical career was joining Elton's band, which proved to be the biggest of all.

Guy worked on the Elton John/Tim Rice reinterpretation of the opera Aída, and in 2001 he was awarded a Grammy for his work. Guy has also been involved in the musicals Billy Elliott and Lestat, which closed in May 2006.

Guy continues to record and perform with the Elton John Band, including performances in Las Vegas for the Red Piano shows at the Colosseum in Caesar's Palace.