The sad news broke just passed midday Tuesday, with A Current Affair writing "It is with great sadness that we share this news with you. Hope and Faith, the conjoined twin girls who captured the hearts of the nation, have died."
"The girls, who were almost three weeks old, were with their parents, Simon Howie and Renee Young, at the time. Our thoughts and prayers are with their family."
The twins, born with a rare condition known as diprosopus, shared a heart, body, limbs and skull, but each had their own brains and set of identical facial features.
Mother Renee Young told Woman's Day that her two daughters had already exhibited 'very separate' personalities.
"Sometimes Faith will cry and wake Hope up, who then looks sideways as if to say, 'Thanks for that'."
The parents received hateful comments criticising their decision to go ahead with the pregnancy after being advised by doctors to terminate at 19 weeks.
Ms Young said she had "more important things to worry about," according to Woman's day.
"Other people's opinions don't matter, but it's sad to hear it. Maybe they are just scared of difference," she said.