Harten made her senior debut for England on 11 November 2007 against Barbados during the 2007 World Netball Championships. She was subsequently a member of England teams that won bronze medals at the 2010 Commonwealth Games and at the 2011 and 2015 Netball World Cups. She was also a member of the England teams that won the gold medals at the 2011 and 2017 Fast5 Netball World Series tournaments. Harten was a prominent member of the England team that won the gold medal at the 2018 Commonwealth Games. In the semi-final against Jamaica, she scored a dramatic last-second winner that saw England reach a Commonwealth Games final for the first time. Harten captained England at the 2018 Fast5 Netball World Series. She made her 100th senior England appearance against Uganda on 12 July 2019 during the 2019 Netball World Cup. In 2020 she received an for her services to netball.