She formed a screen couple with actor Rudolf Prack[1] in a number of films, including Schwarzwaldmädel (The Black Forest Girl) in 1950.

[6] Ziemann and Prack played together again in Die Heide ist Grün (The Heath Is Green) in 1951, attracting over 16 million people to the cinema.

[2] She also played with partners such as Karlheinz Böhm, O. W. Fischer, Gert Fröbe, Johannes Heesters, Curd Jürgens and Hardy Krüger.

[4] She was the first German actor to star in an international production, the 1961 spy drama The Secret Ways (Geheime Wege, 1961), her first American film.

[1][2] In 1962, Ziemann returned to the stage, portraying Eliza Doolittle in productions of My Fair Lady in Zurich and Munich.