| Name | Sienna Hearn |
| Date of birth | July 16, 2002 |
| Place of birth | Sydney, NSW |
| Height | 174cm |
| Preferred position | Right Driver |
| Australian Water Polo League Club | UTS Balmain Tigers |
| International club | |
| Aussie Stingers debut | 2022 |
| International Caps | 14 |
| Handedness | Right |
| Social profiles |
Sienna Hearn started her water polo journey at the Sydney Northern Beaches Breakers Water Polo Club at 7 years old.
13 years later, at the 2022 FINA World League Intercontinental Cup in Peru Sienna made her senior national team debut for the Aussie Stingers.
Outside of the pool, Sienna is currently studying to become a school teacher. In the pool, she is training with the Aussie Stingers squad as they continue to work towards the Paris 2024 Olympic Games.