In 1970, Berger starred for the first time in a film produced by her own company and directed by her husband. Other internationally successful films made by their joint production company included, amongst others, "Die weiße Rose" (1982), "The Nasty Girl" ("Das schreckliche Mädchen", 1990) and "Mutters Courage" (1995). In 1971, Berger took part in the media campaign "We've had abortions!" launched by German feminist Alice Schwarzer with a cover story in the "Stern" political magazine. In 1972, she also campaigned for Willy Brandt's Social Democratic Party.