A statement announcing the service said Jessica, a "dearly loved daughter" and "much loved granddaughter", will be "deeply missed" by family and friends in Australia, and in Sweden, where Jessica's father Lars was born.
Jessica's funeral will be held at St Mary's Catholic Church in Concord at 12pm today, followed by a private family interment.
The Home and Away actress had been in critical condition in hospital for several weeks before the decision to made to turn off her life support one day after the funeral of her parents and sister. Annabelle died in hospital three days later.
Lars Falkholt, 69, his wife Vivian, 60, and the driver of the other auto - 50-year-old Craig Whitall - died instantly.
Jessica Falkholt died in Sydney's St George Hospital on Wednesday morning six days after her life support was switched off
Jessica Falkholt's uncle condemned the driver involved in the fatal vehicle crash that killed the Home And Away actress and her entire family.
Her cousin Cathy Randazzo said Jessica was "vibrant, well mannered and kind-natured with a positive attitude to life".
'Her mum was her biggest supporter, rest assured she is being smothered with love and hugs from Vivian, Lars and Annabelle right now.
"An entire family has been taken by events totally beyond their control", Ponticello said.
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'What occurred does not fit neatly within the definition of accident'.
The family extended their thanks to hospital staff who treated Jessica for more than three weeks as she fought for life.
Mr Ponticello condemned serial driving offender and drug-addict Craig Anthony Whitall, 50, who also died, according to the Daily Mail. You were a rising star.
"The family has asked for privacy during this very hard time". Jessica has been remembered as a "gorgeous soul" and talented actor who was a pleasure to work with.
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Jessica Falkholt appeared in the long-running TV series Home and Away and the soon-to-be-released film Harmony.
Home and Away stars Pia Miller, Jackson Heywood, Philippa Northeast and Isabella Giovinazzo were among the mourners who turned out for Jessica's funeral. Olivia Deeble, who worked onset as Jessica's sister Raffy also showed up to bid her costar farewell.
Other shots show Jessica as a toddler, with friends travelling around the world through her adolescent years and enjoying her life that was tragically cut short. "Shine bright above us, you will always be remembered and in our hearts forever", Ponticello said.
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