[4] Born in Iceland, Lúthersdóttir moved to the United States to study public relations and swam for the University of Florida.

At the 2012 Summer Olympics, she was competed in the 4×100-medley relay but did not win a medal.

She did not qualify for the finals,[8] but was the flag bearer for Iceland during the closing ceremony.

[10] Hrafnhildur is the sister of musician Auðunn Lúthersson, better known as Auður.

[11][12] This biographical article related to an Icelandic swimmer is a stub.