Diandra Paramitha Sastrowardoyo (born March 16, 1982 in Jakarta, Indonesia) -- more popularly known as Dian Sastro or Dian Sastrowardoyo -- is an Indonesian model and actress.

In 1996, she was the cover girl of Gadis, a teen magazine in Indonesia. She later became popular as Daya, the protagonist in Pasir Berbisik (Whispering Sand). Dian finally kick-started her career on the big screen with a starring role in the boxoffice hit (In Indonesia and Malaysia) Ada Apa Dengan Cinta (AADC) (What's Up With Love? (film)). Since then she has established herself as one of Indonesia's most bankable actresses, starring in films such as , Banyu Biru, Ungu Violet and Belahan Jiwa. as well as foreign movies like the Malaysian produced, Puteri Gunung Ledang

Her recent (as of March 2007) television appearances include playing Raya in Dunia Tanpa Koma and a brief stint as the host of the game show Kuis Super Milyarder Tiga Milyar[