In the 1970s and 1980s Bjorn had a successful modeling career, being represented by the Ford Modeling Agency in New York and Nina Blanchard in Los Angeles. She was featured in a great number of television commercials both in Europe and the United States and held exclusive contracts with Noxema and Vidal Sassoon. During that time Bjorn studied acting in Los Angeles and appeared in several films and television shows in the United States, such as More American Graffiti and Get Crazy.
In 1982 Bjorn co-produced, filmed and edited the documentary From Iceland to Brazil, about Icelandic immigrants to Brazil in the 1870s, and in 1987 she produced and directed the documentary Love & War, about the "war brides" of Iceland.
Bjorn divides her time between Europe and the United States. Her partner since 1994 is advertising CEO Halldor Gudmundsson.
In 2003 Bjorn graduated from the Iceland Academy of the Arts with a BA degree in graphic design. Since then she has worked as a freelance graphic designer, focusing on logo and book design.
In 2011 the Boston Globe claimed that Bjorn gave the FBI information that led to notorious gangster and fugitive James "Whitey" Bulger's capture. That story has however not been confirmed by either Bjorn or the FBI.
