She had a long career in theatre, but is best known for her roles in certain classics of Norwegian cinema, such as the Oscar-nominated Nine Lives (1957) and Lake of the Dead (1958).

Moan was married to the author André Bjerke and later lived with singer Ole Paus.

[10] Moan acted both at Det Norske Teatret (the Norwegian Theater), Oslo Nye Teater and at Nationaltheatret (the National Theatre), in roles such as "Marguerite" in Dumas's The Lady of the Camellias, and "Miss Julie" in Strindberg's play by that name.

Here she appeared in what was to become an iconic scene of Norwegian cinema, where she walks in a white, translucent dress along a tarn in the forest.

[5] On television she is known for her role in the 1978 science fiction series Blindpassasjer (Blind passengers), written by Tor Åge Bringsværd and Jon Bing.

[15] She played the part of "Edvarda" in a 1975 TV series based on Knut Hamsun's novels Benoni and Rosa.