Hunter made her England debut in 2007. She had trained as a centre but joined the England squad as a back row player after coach Phil Forsyth moved her at Under-19s trials. She led the England team to win the 2014 Women's Rugby World Cup and won her hundredth cap in November 2017 as England played Canada in the semi-finals of the 2017 Women's Rugby World Cup. As of April 2021, Hunter is the second most capped England Player of all time.