Sadhana Shivdasani (2 September 1941 – 25 December 2015) known mononymously as Sadhana, was an Indian actress who worked in Hindi films, primarily active between 1958-1981. Regarded as one of the finest and iconic actresses of the golden age of Hindi Cinema, Sadhana was noted for her exquisite beauty, understated acting and trend-setting fashion statements. Popularly known as "The Mystery Girl" for her stint as the "mysterious woman" in the suspense thriller trilogy films directed by Raj Khosla during the mid 1960s, Sadhana was ranked among the highest-paid actresses in the country from mid-1960s to early 1970s