Hammerseng-Edin made her début on the Norwegian national team in 2006, and played 59 matches and scored 143 goals between 2006 and 2013. She represented Norway when the team won a bronze medal at the 2009 World Women's Handball Championship in China, as well as winning a silver medal at the 2012 European Women's Handball Championship in Serbia. She was also part of the National team at the 2013 World Women's Handball Championship.