The film struck very close to home for Ingrid Bergman to the extent that she was quite shocked when she read the screenplay for the first time. It deals with a self-centered artist who leaves her children in their formative years to go off and pursue her career. During the late 40s, Bergman herself became a cause celebre by abandoning her family to run off with Italian film director, Roberto Rossellini.
While Ingrid Bergman portrays Charlotte the pianist, the person we really see and hear playing is Ingmar Bergman's ex-wife Käbi Laretei, an acclaimed concert pianist. She even acted as Ingrid's body double at the keyboard.
As Ingmar Bergman was essentially exiled from his native Sweden because of an ongoing battle with the tax authorities, the film was financed by his West German company, Personafilm GmbH, and Lew Grade's ITC Film, and shot in an old film studio outside Oslo in Norway.