When Thorisson was 12 years old she played well in a match against a touring Icelandic team. Her father told the opposition coach of her Icelandic heritage and the coach passed the information on to the
Football Association of Iceland. Later Thorrison was approached to play for Iceland's youth national team through her Rosengård teammates
Sara Björk Gunnarsdóttir and
Þóra Björg Helgadóttir. Thorrison has also trained with Sweden's youth national teams at
Bosön and as of 2016 remained undecided about which national team to represent at senior level. Before the men's
2018 FIFA World Cup in Russia, Thorisson diplomatically stated that she was supporting Sweden, Iceland and Peru equally. Ultimately she decided to make herself
eligible to represent Iceland at senior international level. == Honours ==