Calvin Klein is a fashion designer from the United States. He founded the Calvin Klein brand in 1968, which became popular for its minimalist and modern aesthetic. The brand is known for its clothing, fragrance, and accessories. Calvin Klein has made significant contributions to the fashion industry, especially in the areas of denim and underwear. In addition to his work as a designer, Klein is also known for his philanthropic efforts, including his support of HIV/AIDS research and education.