Sydney is gearing up to showcase one of the world's biggest New Year's Eve fireworks displays, which this year will include a celebration of Australia's 'yes' vote to same-sex marriage.
Eight tonnes of fireworks will light up the city's famous Harbour Bridge and Opera House on Sunday evening in front of more than a million people.
Nearly half of those who will flock to vantage points are estimated to be tourists and the peak industry group says they'll inject about $170 million into the Sydney economy, with a knock-on effect for the national economy.
"We're a very popular destination on New Year's Eve," Tourism and Transport Forum CEO Margy Osmond told reporters on Saturday.
The majority of the visitors will be from China, however Ms Osmond said Sydney was also a popular New Year's Eve destination for Italians and Americans.
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"It is setting the tone for our future tourism efforts and there's no doubt with the theme of love being the go, it's a highly appropriate one for 2017," she added.
This year's $7 million display, which features more than 100,000 individual pyrotechnic effects, includes a cascading rainbow of fireworks as a nod to the successful postal vote on same-sex marriage and the subsequent change to the law.
There's also a touch of Hollywood in the mix, with one dazzling gold display co-designed by Hugh Jackman and set to the music of renowned indigenous musician Dr G Yunupingu.
Jackman has described his contribution as "a little moment of peace" amongst the spectacular sound, colour and celebration of the overall show.
The enormous crowd will watch 28,000 fireworks shot from 175 firing points on the Sydney Harbour Bridge - 3000 more than previous years.
The evening also represents a record operation for the state's police, with officers in the sky, on the water, on horseback and on foot keeping a close eye on revellers.
Dozens of riot squad officers will be armed with semi-automatic rifles, with senior police admitting Australia's terror environment has evolved, but crowds have still been urged to stick to their plans and enjoy the entertainment.
The Bureau of Meteorology expects morning showers to clear during the afternoon and evening with a top of 25C.
