Aussies around the nation headed to the polls to have their say on whether the nation should agree to introduce the proposed Voice to parliament.
Click through to see pictures from around the country.
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The Australian Electoral Commission will count every ballot cast today, as well as a majority of the more than five million early votes cast over the last two weeks.
Counting is now well underway.
Follow live updates here.
Unlike elections, the ballots themselves are expected to take far less time to count, as there's only two options to count and no preferences to take into consideration.
AEC staff count votes at a vote counting centre in Melbourne.
Meanwhile Prime Minister Anthony Albanese is set to deliver an address to the nation later this evening regardless of the referendum result, 9News political reporter Eliza Edwards says.
Voters cast their vote at a polling centre in the beachside suburb of St Kilda in Melbourne.
As usual at Aussie polls, plenty of voters bought their dogs along.
Katani and Isabella prepare for the obligatory sausage sizzle as Isla looks on at Saint Therese Primary School in Lakemba in Sydney's west.
The "democracy sausage" and cake stalls are all part of Australian polling days, and it's no different in this referendum.
A woman drops her ballot into a box in Redfern in inner Sydney.
The area has always had a high Indigenous population who will be watching the result closely.
Voters line up to cast their vote at a polling centre at Muswellbrook Indoor Sport Centre in the NSW Hunter region.
The referendum question is:
A Proposed Law: to alter the Constitution to recognise the First Peoples of Australia by establishing an Aboriginal and Torres Strait Islander Voice.
Do you approve this proposed alteration?
Two women have their say at Hampton Park Public School in Lakemba in Sydney's west.
Takani Warner votes with her daughters in the Indigenous community of Cherbourg in Queensland.
A classic Australian shot of Surf Life Savers casting their vote at a polling centre in Bondi Beach in Sydney.
Prime Minister Anthony Albanese made a plea for Australians to vote Yes.
He said voters today had "an opportunity to make history" by supporting the Voice to parliament.
Albanese stopped for plenty of selfies in Balmain.
Senator Lidia Thorpe, a prominent No campaigner, voted in Melbourne's north and said it was a "sad day" for Australia.
"How dare 97 per cent of this country decide our destiny — this referendum has done nothing but hurt people and divide communities," she said.
The back of Thorpe's T-shirt listed her "problems" with The Voice.
Some took the opportunity to dress up, with Ben Betts wearing a pink tutu and fairy wings as he grabbed a snag at a polling place in Redfern in Sydney.
Activist Danny Lim took the opportunity to send a message about the referendum with his sign.
Long lines at Bondi Beach's polling station.
Albanese has said that if the referendum succeeds, the government will propose legislation for the Voice this parliamentary term.
Indigenous activist Susanne Levy shows her feelings in Canberra in the ACT.
The Liberal Party is opposed to the Voice.
Opposition Leader Peter Dutton announced the party's position in April, saying he doesn't think the model proposed "is in our country's best interests".
Federal Minister for Indigenous Australians Linda Burney with her ballot paper.
Burney reiterated the Yes campaign's long-held message that there is nothing to fear from backing the Voice to parliament.
"There is nothing to fear in an advisory committee that's going to bring better outcomes to Indigenous Australians and bring us closer together as a nation," she said.
A sign advertising the classic sausage sizzle, costing $4 each at this spot.