Grethe Ryen (24 November 1949 – 5 July 2020) was a Norwegian actress. She played at the Norwegian touring theatre Riksteatret from 1974 to 1975, Teatret Vårt from 1975 to 1977, and, after 1977, at Det Norske Teatret. She appeared many movies such as Karjolsteinen and Den sommeren jeg fylte 15. She was born in Oslo.
Ryen died on 5 July 2020 in Oslo, aged 70.
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