Julia Roberts has been doing her mandatory 14-day quarantine in one of Sydney's most exclusive properties, which is worth an estimated $56.9million.

The Hollywood actress arrived in Australia just over a week ago to begin shooting the romantic comedy Ticket to Paradise in Queensland with George Clooney.

Julia, 54, is quarantining at a luxury harbourside mansion in lower Vaucluse, but it turns out the property is shrouded in mystery.

Mystery mansion: Hollywood actress Julia Roberts is quarantining at this luxury harbourside mansion in lower Vaucluse, but it turns out the property is shrouded in mystery

According to property records obtained by realestate.com.au, the four-bedroom home has only traded hands once in 40 years. 

It was originally bought in 1981 for $2.185million by an undisclosed buyer and was later purchased by the late businessman David Coe in 1997 for $14.637million.

Coe was the chairman and managing director of Allco Finance Group. 

Upcoming film: Julia, 54, arrived in Australia just over a week ago to begin shooting the romantic comedy Ticket to Paradise in Queensland with George Clooney.

He died of a heart attack while skiing in Aspen, Colorado, in 2013.   

The mansion has not been sold since then, giving it a sense of mystery because no photos of the interiors have been published in real estate listings since 1997.

Under current property market standards, the home could be worth even more than its current estimated $56.9million price tag, depending on the interior features.

History: The mansion has not been sold since 1997, giving it a sense of mystery because no photos of the interiors have been published in real estate listings since then

The mansion Julia is renting could cost tenants more than $20,000 a week.  

The residence is on a street that has housed some of the most famous celebrities and businessmen from Australia and abroad.

In 2011, actor Leonardo DiCaprio stayed at a luxury property just across the road from Julia's rental when he was in Sydney to film Baz Luhrmann's The Great Gatsby. 

He is believed to have spent an eye-watering $15,000 a week to live there.

Star street: The mansion Julia is renting is on a street that has housed some of the most famous celebrities and businessmen from Australia and abroad

Some other notable names who live in the area include Harry Triguboff, Sydney's wealthiest resident and Australia's third-richest billionaire.

The 87-year-old Meriton boss has owned a mansion in Vaucluse since 1983. 

Menulog founder Leon Kamenev purchased four adjoining blocks for almost $80million in 2016.

Pub baron Justin Hemmes also owns a luxury harbourside home. 

Businessman James Packer previously lived in the area before he sold his mansion, known as La Mer, in 2015 for $70million. 

Inside La Mer: Businessman James Packer previously lived in the area before he sold his mansion, known as La Mer, in 2015 for $70million