Wengraf was born in the vibrant city of Vienna, the capital of Austria, to a director of an insurance company. This influential figure in her life would likely have played a significant role in shaping her early years and future endeavors.
After completing her education at a prestigious drama school, Wengraf made her stage debut at the esteemed Volkstheater in 1946. This marked the beginning of her illustrious career in the performing arts, which would span many decades to come.
Wengraf's film career commenced in the same year, with a supporting role in Géza von Cziffra's marital comedy Glaube an mich (1946). Interestingly, this film was Austria's first post-war motion picture, making it a significant milestone in the country's cinematic history.
As her career progressed, Wengraf became best known in the mid-1950s for her screen appearances as Countess Bellegarde in two films concerning the tragically short life of Empress Elisabeth of Austria, also known as Sissi. These films, which starred Romy Schneider and Karlheinz Böhm, cemented Wengraf's reputation as a talented actress and set the tone for her future performances.
Throughout her career, Wengraf appeared in a wide range of films, including comedies, operettas, and period dramas. She often portrayed elegant and refined characters, such as grand dames and social lionesses, on the big screen, television, and radio.
In addition to her screen work, Wengraf maintained a busy theatrical career in Germany and Austria. From 1978, she was an ensemble member of the Theater in der Josefstadt, a prestigious theater company in Vienna.
Wengraf's personal life was also marked by a high-profile relationship with former Austrian Chancellor Bruno Kreisky. This relationship was well-documented and was the subject of a book by Senta Ziegler, entitled "Österreichs First Ladies: Von Luise Renner bis Margot Klestil-Löffler".
Furthermore, Wengraf was a long-standing muse of the renowned opera writer and critic Marcel Prawy, who remained a significant figure in her life until his passing in 2003.
