[2] Hammett is a synchronised swimmer,[2] taking up the sport after she read an advertisement for it in a newspaper when she was eight years old.

[1] Hammett joined Australia's elite national synchronised swimming team in 2006, and made her international debut at the 2007 World Aquatics Championships in the free combination event.

[2] Hammett finished 4th in the team event and 12th in Duet at the 2010 Swiss Open in Arbon, Switzerland.

[2] The FINA World Championships held in Shanghai, China, served as the 2012 Olympic qualifying event for the team.

[2][5][6][7] Hammett competed in the team event with Eloise Amberger, Jenny-Lyn Anderson, Sarah Bombell, Olga Burtaev, Tamika Domrow, Tarren Otte, Francesca Owen and Samantha Reid, finishing in eighth place overall.

[8][9] In 2015, Hammett competed with the Australian synchronised swimming team at the 2015 World Aquatics Championships held in Kazan.

[2] In 2016, Hammett was selected to represent Australia at the 2016 Summer Olympics held in Rio de Janeiro, alongside Hannah Cross, Danielle Kettlewell, Nikita Pablo, Emily Rogers, Cristina Sheehan, Amber-Rose Stackpole, Amie Thompson and Deborah Tsai.