Singer, actor, record producer, lawyer, television actor, film actor and composer. Member of the Advisory Board of UNICEF Mexico and Goodwill Ambassador. The Black Jeans are the pioneers of rock and roll in Mexico, having been founded in 1956 by Diego de Cossío. César Roel began his musical career under that name in 1958 as the lead singer in the group Los Black Jeans, which also included Juan Manuel de Cossío, Diego de Cossío and Carlos Loftus, singing Spanish versions of English hits. In 1958, they recorded for the Peerless record company "La Batalla de Jericho" and "La Cucaracha", being one of the pioneers in rock and roll recordings in Mexico.

When the group signed with the Musart label, they changed their name to Los Camisas Negras, and César Roel became César Costa (in honor of bandleader Don Costa) and they were reinforced with Javier de la Cueva on piano. Their first and only LP was released in 1960.