[1][2] Arna was born in Reykjavík to Ellert Schram and Anna Guðlaug Ásgeirsdóttir.
[3] She started her journalism career with Dagblaðið Vísir but moved to Morgunblaðið in 1995.
[5] In 2010, Arna was hired as Kópavogur's information officer and a year later she became the town's director of cultural affairs.
From the spring of 2017 until her death, she worked as the director of the City of Reykjavík's Department of Culture and Tourism.
[6] Arna died at the National University Hospital of Iceland in Reykjavík, on 11 January 2022, at the age of 53.