Lovely Jacqueline Sassard's career as a leading actress endured just over a decade and was launched not in her native country, but across the border in Italy. Her first featured role was as the titular heroine in Alberto Lattuada's Guendalina (1957) at the tender age of 17. This got her noticed and paved her way to headline in a string of popular comedies, beginning with March's Child (1958) (as a young woman going through a failing marriage to an older architect, played by Gabriele Ferzetti). For her performance, Sassard was awarded a Zulueta Prize as best actress at the San Sebastián International Film Festival in 1958. In the black comedy Three Murderesses (1959), she again proved her flair, portraying one of a trio of jilted ladies plotting revenge on a caddish playboy (Alain Delon). That same year, she also made two significant forays into serious drama with Luigi Zampa's Il magistrato (1959) and Valerio Zurlini's Violent Summer (1959), set in Italy during World War II. Now at the height of her popularity, Sassard was featured on the cover of Tempo magazine and in an edition of Playboy. By the early 60s, the honeymoon was suddenly over. Her subsequent films were of decidedly lower quality, including peplum, tawdry costume dramas and corny musical comedy. A perhaps non unexpected two-year hiatus followed, after which Sassard made a brief comeback as an enigmatic Austrian princess in Joseph Losey's off-beat drama Accident (1967) and as one third of a ménage à trois in Les Biches (1968), alongside Stéphane Audran and Jean-Louis Trintignant.

Little information exists about Sassard's private life, save that she left show biz upon her marriage to automobile manufacturer Gianni Lancia and eventually retired -- far from the limelight -- to the well-to-do neighbourhood of Saint-Jean-Cap-Ferrat in the Provence-Alpes-Côte d'Azur region of southern France.