Although Yves Saint Laurent is one of the most iconic designers of the 20th century, he was still relatively unknown when he designed Catherine Deneueve's costumes in Belle de Jour (1967). Using ladylike silhouettes made of surprising materials like patent leather, he perfectly captured the spirit of Deneuve's character, Severine, who was a housewife with a secret fetish for prostitution. Later in life, he designed a small clutch in homage to the movie, which is still available today.