Sissi – Fateful Years of an Empress (German: Sissi – Schicksalsjahre einer Kaiserin) is a 1957 Austrian film directed by Ernst Marischka and starring Romy Schneider, Karlheinz Böhm, Magda Schneider, Gustav Knuth and Josef Meinrad, costumes by Gerdago (Gerda Gottschlich). It was entered into the 1958 Cannes Film Festival.

It is the last film in the Sissi trilogy, following Sissi (1955) and Sissi – The Young Empress (1956). The director Ernst Marischka planned a fourth film, but Schneider refused to play Sissi any longer. She appeared 15 years later again as Empress Elisabeth in Luchino Visconti's 1972 film Ludwig.