Ruy Rei had much success with his orchestra Ruy Rey e Sua Orquestra (formed in 1948), specialized in Latin-American rhythms, which were in high demand at the time. His first composition, the rumba "Naná" (with Ruthinaldo Silva) was recorded in 1949, but the orchestra had had a hit in the year of its formation with the Carnaval marchinha "A Mulata É a Tal" (João de Barro/Antônio Almeida). This combination shaped the orchestra's style: Carnaval music during Carnaval, Latin sounds for the rest of the year. Its biggest hits were the boleros "Camino Verde" and "Ansiedad", the mambos "Cao Cao Mani Picão" and "Mambo Jambo", the rumba "Zé Betum" and the cha-cha-cha "Torero". Rei also worked as an actor in Atlântida films like Carnaval no Fogo (1949), Aviso aos Navegantes (1950) and O Petróleo é Nosso (1954), all by Watson Macedo. Between 1950 and 1965 he toured the country as a singer, and in 1968 his orchestra was dissolved. He had begun his career in the late 30's, as a crooner of the brothers Copia group (in São Paulo). The 40's found him working at the Rádio Tupi (São Paulo), at the Cabaré OK and in the Orquestra de J. França. Moving in 1944 to Rio de Janeiro, Rei worked in the Rádio Nacional until the creation of his orchestra.