Oscar de la Renta was born in Santo Domingo, Dominican Republic, to a Dominican mother, Carmen María Antonia Fiallo, and a Puerto Rican father, Óscar Avelino De La Renta, owner of an insurance company. The Fiallos, De la Renta's mother's family, were so embedded in Dominican society that they could count poets, scholars, and businessmen, as well as top army brass among their members. Their origin in the island can be traced back to the foundation of San Carlos de Tenerife in 1685 by Canarian settlers. A maternal uncle, Luis Arístides Fiallo Cabral, was a doctor, lawyer, and architect, who received every degree the
Oscar de la Renta join Antonio del Castillo as a couture assistant at Lanvin in Paris. In 1963, de la Renta turned to Diana Vreeland, the editor-in-chief of "Vogue" for advice, saying that what he really wanted was to "get into ready to wear, because that's where the money is". Vreeland replied, "Then go to Arden because you will make your reputation faster. She is not a designer, so she will promote you. At the other place, you will always be eclipsed by the name of Dior." De la Renta proceeded to work for Arden for two years in New York City before he