They were reunited in 2002 but the relationship proved difficult to maintain after so long apart.
Warner made a heartfelt plea for people to give the family space to grieve. "It's time to let it be and let her rest," she said.
Dawson had most recently worked as a judge on the television show Australia's Next Top Model but quit the role and was having financial difficulties.
A memorial attended by 150 of her Australian friends and work colleagues was held in Sydney shortly after her death.
Where to get help
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