Natacha Rambova (Winifred Shaughnessy, January 19, 1897 – June 5, 1966) was an American film costume and set designer, best known for her marriage to Rudolph Valentino. Although they shared many interests such as art, poetry and spiritualism, his colleagues felt that she exercised too much control over his work and blamed her for several expensive flops.

In later life, she continued her spiritualist activities, as well as studying Egyptology. When Kosloff was hired by Cecil B. DeMille as a performer and costume designer for Hollywood films, Rambova carried out much of the creative work as well as the historical research.