The 28-year-old's father Lars, 69, mother Vivian, 60, and sister Annabelle, 21, were all farewelled in a joint service in front of hundreds of mourners on Wednesday.
Annabelle died in hospital a few days after the crash, with Jessica remaining in a coma - unaware that her family lost their lives.
The revelations come as former Home and Away actress remains in a critical condition at St George Hospital after her life support was turned off.
There has been no official confirmation from the NSW Police or hospital that the actress has died.
Actress Jessica Falkholt who was known primarily for her role in the Australian television series, Home and Away breathed her last today.
The newspaper also revealed Craig Whitall, 50, the driver of the other vehicle involved who also died in the crash, had previously had a nine-year driving ban and at least 10 convictions for driving while disqualified.
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The remains of those killed in the crash were so badly burned, they had to be identified by their dental records, SBS reported.
"Lars adored his girls, and was never happier when he was with them", Vivian's younger brother, Paul Ponticello, said.
News.com.au report that Mr. Ponticello told the service: "The irony of the tragedy is that Lars was such a careful driver".
'Their lives on this earth ending on a highway makes absolutely no sense'.
'They are together and always will be. You will always be remembered and in our hearts forever.
Falkholt played Hope Morrison on the long-running Australian soap opera. She then filmed a role in the USA film Harmony, which is set for release this year.