William Duborgh Jensen (10 May 1935 – 24 May 2017) was a Norwegian fashion and costume designer.
William was first known as a fashion designer; he was Norway's first "haute couturier" with his own collection in 1958. He later worked in television and film as a costume designer.
He was appointed as a Knight, First Class of the Order of St. Olav in 2006 for his efforts in fashion design.
William died at the age of 82.