Juan José Colomer (born Juan José Revueltas Colomer in Alzira, Valencia, Spain, 1966) is a Spanish composer.
Juan Colomer started his music studies at age 8 in his local music school, "Sociedad Musical de Alzira." He continued his studies in the Conservatorio Superior de Música de Valencia, where he graduated in trumpet & composition. In 1990 he moved to Boston where he studied Film Scoring at Berklee College of Music.
In 1992 he moved to Los Angeles, his actual residence, where he started working as a film composer, as well as arranging and producing for other artists. He has worked and collaborated with artists like Alejandro Fernández, Bebu Silvetti, Juan Carlos Calderón, Vinnie Colaiuta, and Ramón Flores.
In 1999 he recorded a CD with his own songs in Spanish, under the name of Bella y oscura, entitled "Reina en prisión" (queen in prison) with Esmeralda Grao as the lead singer.
In 2006 he became an American citizen and now has dual Spanish-American citizenship.
He is also known by his nickname in Spain Juanjo Colomer.
His classical work, as a composer or orchestratror, has been performed and recorded by James Levine, Plácido Domingo, José Carreras, Christian Lindberg, Vienna Symphony orchestra, Orchestre de Paris, Simón Bolívar Youth Orchestra, Orchestra & choir of the Arena di Verona, Orquesta de la Comunidad Valenciana, Orquesta de Castilla y León and Spanish Brass. He has worked regularly with Plácido Domingo as an orchestrator for the Christmas in Vienna series of concerts, as well as The three tenors concerts in Paris 1998 and Monterrey in 2005, the Arena de Verona and the Operalia anthem. Recently he arranged and orchestrated several of the tracks for the CD Pasión española (Spanish passion) with Plácido Domingo and the Orquesta de la Comunidad de Madrid conducted by Miguel Roa, for the Deutsche Grammophon label. This CD won a Grammy for Best Classical Album at the 2008 Latin Grammy Awards.