She is a well-known portraitist who has photographed Yves Saint-Laurent, Billy Wilder, Catherine Deneuve, Nicole Kidman, Madonna, and even the Hells Angels for magazines such as Vanity Fair, Elle, and Vogue.
She died in her home on Friday, according to the Helmut Newton Foundation, of which she was president.
“We mourn the loss of an outstanding person and an internationally recognised photographer,” the foundation said in a statement.
Newton, whose maiden name was Brown and who worked under the alias Alice Springs, got her start in photography when she stood in for her partner, renowned photographer Helmut Newton, on a shoot in 1970.
They met when she was 24 years old and living as an actress in Australia.
Helmut Newton was killed in a car crash in Los Angeles in 2004 after they had been together for more than 60 years.
The same year, she founded the Helmut Newton Foundation in Berlin, where her late husband was cremated.