Sissi – Fateful Years of an Empress (German: Sissi – Schicksalsjahre einer Kaiserin) is a 1957 Austrian film written and directed by Ernst Marischka and starring Romy Schneider and Karlheinz Böhm, with Magda Schneider, Gustav Knuth, Uta Franz, Vilma Degischer and Walther Reyer. It was entered into the 1958 Cannes Film Festival. The costumes are by Gerdago (Gerda Gottschlich).

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.