Jessica Falkholt remains critical after life support turned off

Australian actress Jessica Falkholt remains in a critical condition after her life support was switched off on Thursday, more than a fortnight after a horror crash that killed her parents and younger sister.

The 29-year-old has been fighting for life in St George Hospital since she was pulled from the wreckage, along with her sister Annabelle, 21, on December 26 near Ulladulla.

The family's car was hit by a four-wheel drive, incinerating both vehicles, and parents Lars and Vivian died at the scene.

Annabelle died as a result of her injuries last Tuesday and on Thursday The Daily Telegraph reported Falkholt's life support had been turned off.

A spokeswoman for St George Hospital told Yahoo7 that Jessica "remains in a critical condition" but further details could not be provided.

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The driver of the four-wheel-drive, 50-year-old Craig Whitall, was reportedly travelling home from a Nowra methadone clinic when he was also killed in the collision.

Whitall was a habitual traffic offender with more than 60 convictions to his name, according to The Daily Telegraph.

Falkholt's family were laid to rest after a funeral at St Mary's Catholic Church in Concord on Wednesday.

The family was remembered as an inseparable, radiant group.