Born in Casablanca, Morocco, at 20 years old, Jean-Charles de Castelbajac began designing for his mother who had her own clothing business. Soon after, he created several lines for Paris manufacturer Pierre D'Alby and by 1975 had opened his own business. 

Part of a new generation of French ready-to-wear designers, de Castelbajac worked with Pop Art themes such as Andy Warhol's Campbell's soup can painting, which he printed onto a cylindrical dress in 1984. Themes of surrealism and futurism are also key to de Castelbajac's designs.

While continuing to design under his own name, he simultaneously created Sportmax for the Italian house of Max Mara. Today, the Castelbajac brand extends beyond women's and men's ready-to-wear, now incorporating jeans, sportswear, accessories, bags, umbrellas, glasses, ties, jewellery, porcelain, lights, carpets, household linen and home furnishings.