Packer began her international career playing for England in 2008. In 2013, she played for the England squad at the
2013 Women's Rugby World Cup Sevens in Moscow. She went on to play for the winning England 15s team during the
2014 World Cup, and again in the
2017 Women's Rugby World Cup. In 2017 she also played for England in the
Women's Six Nations tournament and was part of the winning
Grand Slam team in the
2019 Women's Six Nations, playing in four of England's five games. She has won four Six Nations Grand Slam titles with England to date. Packer started in all but one of England's
2019 Women's Rugby Super Series games and was awarded a full time contract to play in the England team in 2019. In 2020, an ankle injury kept her from playing in the year's Six Nations championship. She was named in the
England squad for the delayed
2021 Rugby World Cup held in New Zealand in October and November 2022. On 17 March 2025, she was called into the
Red Roses side for the
Six Nations Championship. She was named in England's squad for the
Women's Rugby World Cup. == Club career ==