Hartigan was born in Campbelltown, New South Wales and played her junior rugby league for the Currumbin Eagles.
[1] Her father, Aseri Laing, played for the Western Suburbs Magpies and Melbourne Storm in the National Rugby League (NRL).
[3] On 22 June 2019, Hartigan made her Test debut for Fiji, starting at five-eighth and scoring a try in their 28–0 win over Papua New Guinea.
[4] In 2020, Hartigan joined the Burleigh Bears QRL Women's Premiership team, starting at centre in their Holcim Cup Grand Final win over the Souths Logan Magpies.
[6] In Round 1 of the 2020 NRL Women's season, she made her debut for the Warriors, starting at centre in a 14–28 loss to the Brisbane Broncos.