Simi Garewal or Simi Grewal (born 17 October 1940) is an Indian actress. She acted in Bollywood and was known for being bold. Simi Garewal's first role was in the English-language film Tarzan Goes to India in 1962, alongside Feroz Khan.

She returned to India as a teenager to become an actress and had to learn Hindi. In the 1960s and '70s she played in Indian films, working with leading directors such as Raj Khosla in Do Badan,Raj Kapoor in Mera Naam Joker, (1970),Satyajit Ray in Aranyer Din Ratri (Days and Nights in the Forest) and Mrinal Sen in Padatik (The Guerilla Fighter). She also starred in Columbia Pictures' Siddhartha.

She made a strong impression as a vamp in Karz (1980). She also starred in the BBC docu-drama Maharajas (1987), based on the book by Charles Allen. But in the early eighties her attention turned to writing and direction, forming her own production company, Siga Arts International. She hosted, produced and directed a TV series for Doordarshan called It's a Woman's World (1983).

She also made a documentary for Channel 4 in the UK called Living Legend Raj Kapoor (1984). This was followed by her three-part documentary on Rajiv Gandhi titled India's Rajiv which also received international acclaim. She also wrote and directed a Hindi feature film Rukhsat and produced television commercials, for which she won the 1st Prize from the 1988 Paters Award in Australia.