After her studies at the Bühnenstudio Zürich she went to the German Democratic Republic in 1967, where she worked as a theater actress.
At the end of the 1970s she returned to Switzerland, where she worked as an actress, cultural journalist and language teacher.
In 1986, Keller was the director of the asylum in Bernard Safarik's feature film Das kalte Paradies ("The Cold Paradise").
"), published in 2015, deals with her father Franz, who left Switzerland as a Swiss communist in 1945 to get involved in the construction of the German Democratic Republic.
[5] In 2017, she published her travel report on a motorcycle tour on Route 66 from Los Angeles to Chicago, L.A.