Quarteto em Cy (a play on words of the Portuguese for Quartet in B by poet and lyricist Vinicius de Moraes) is a Brazilian girl group originally composed of four sisters hailing from Ibirataia, a town located in the Brazilian state of Bahia: Cybele, Cylene, Cynara and Cyva – their real first names.
They started performing in 1959, appearing on local television in that year. Cyva, the leader of the group, then moved to Rio de Janeiro, and persuaded her three sisters to join her there. They then started to make regular appearances in the boates (small nightclubs) of Rio, particularly Bottle's bar and the legendary Zum-Zum, where they caught the attention of de Moraes and other prominent figures of the bossa nova scene. Their first album was released in 1964, and was to be followed by regular releases up to the late '90s, at the frequency of one a year, and sometimes more. Connoisseurs of MPB and tropicalia have a particular regard for the first few years of their recording career, when they were signed to Brazil's most daring label, Elenco.