A spokesperson for St George Hospital revealed that Jessica passed away at 10:20am on Wednesday morning.
The 29-year-old actress was involved in a Boxing Day car crash that killed her parents, Lars, 60 and Vivienne, 60, as well as sister Annabelle, 21.
The statement released from the hospital reads: 'On behalf of the family of Jessica Falkholt, St George Hospital has been asked to advise the media and the community of Jessica's passing today at 10:20am.
'Jessica passed away from serious injuries sustained in a motor vehicle accident on 26 December, 2017.
'The family has asked for privacy at this very difficult time.'
Our thoughts are with all those that knew Lars, Vivienne, Jessica and Annabelle.