From 1959 to 1978, Andrsová worked with Josef Svoboda's avant-garde multimedia company Laterna Magika, initially as a chorus girl and later (beginning in 1973) as a prima ballerina. In Allen Hughes' review of the company's August 1964 Carnegie Hall debut of a presentation that gave 23 performances at that venue under the direction of Miloš Forman, they are described as "a Czech theatrical spectacle that first came to international attention at the Brussels World's Fair." In 1966 Andrsová starred in Alfréd Radok's choreographed multimedia production "Laterna Magika: Variation 66, The Opening of the Wells", cowritten by Forman in collaboration with Jan Švankmajer.