Sigrún Edda Björnsdóttir (born 30 August 1958) is an Icelandic actress and author.

Björnsdóttir was born in Reykjavik, Iceland to parents Guðrún Ásmundsdóttir, actress and Björn Björnsson, flight mechanic.

Björnsdóttir graduated from the Icelandic Theater School in 1981. She has played in numerous productions for the National Theater of Iceland as well as other theaters. She has played roles including Pippi Longstocking to Ophelia in Hamlet.

Björnsdóttir has two children and is married to set designer Axel Hallkell Jóhannesson.

In 2001 Björnsdóttir released her first book. The book is about a young troll girl Bóla and her friend Hnútur on their adventures from their home in Þingvellir to a 17 June (Iceland's Independence Day) celebration in Reykjavik. Bóla is a character Björnsdóttir created and played for children's television in 1990 and is still very much adored by Icelandic children and adults.

Filmography: Morðsaga (1977) as Frú B, Óðal feðranna (1980) as Stelpa á útimóti, Atómstöðin (1984) as Guðný Árland, Fastir liðir eins og venjulega (TV-series) (1985) as Erla, SSL-25 (Short) (1990), Einkalíf (1995) as Sísí, Alexanders mother, Réttur (TV-series) (2010) as Eva, Svartur á leik (2012) as Sævar K's Mother, Metalhead (2013) as Anna, Afinn (2014) as Erla, Ófærð (TV-series) (2015-2016) as Kolbrún