Sadhana Shivdasani known mononymously as Sadhana, was an Indian film actress active between 1960 and 1981. She is regarded as one of the greatest actresses in Indian cinema. Popularly known as "The Mystery Girl" for playing mysterious women in films like Woh Kaun Thi? (1964) and Mera Saaya (1966), Shivdasani ranked as the highest-paid actress in the country from mid-1960s to early 1970s.