In 1963, Clark wrote the soundtrack for the French crime film "A Couteaux Tirés" ("Daggers Drawn") - released in 1964 - and made a cameo appearance as herself in the film. Although it was only a mild success, it added a new dimension—that of film composer—to her career. Additional film scores she composed include "Entre ciel et mer" (1963), "Rêves d'enfant" (1964), "La bande à Bebel" (1966), and "Pétain" (1989). Six themes from the last were released on the CD "In Her Own Write" in 2007.