Marcos Kostenbader Valle (born September 14, 1943 in Rio de Janeiro) is a Brazilian singer, songwriter and record producer. His work has found success across many musical styles both within Brazil and in the rest of the world, including bossa nova, samba, incidental music for drama, and fusions of American/European rock and dance music with Brazilian styles. His brother is Paulo Sergio Valle, with whom he composed many songs. From the younger Bossa Nova generation, as well as Bebel Gilberto and others, made a large part of his career abroad.