Gladys Berejiklian votes as polls open knife-edge election tipped to be the ...

Voting has opened across New South Wales in an election that's tipped to be one of the closest in decades.

More than four million people are expected to vote at more than 2200 polling booths around the state.

NSW Premier Gladys Berejiklian and Opposition Leader Michael Daley were up early on Saturday to cast their votes.

NSW Premier Gladys Berejiklian (pictured) and and Opposition Leader Michael Daley were up early to cast their votes on Saturday

NSW Premier Gladys Berejiklian (pictured) and and Opposition Leader Michael Daley were up early to cast their votes on Saturday

More than four million people are expected to vote at more than 2200 polling booths around the state as voting opens on Saturday morning

More than four million people are expected to vote at more than 2200 polling booths around the state as voting opens on Saturday morning

Ms Berejiklian was at Willoughby Public School, in Sydney's north, submitting her voting form.

The NSW premier is aiming to become the first popularly-elected female premier in NSW history - and based on the latest polls, this is now a distinct possibility. 

'It's going to be really really tight and I think today the people will decide for themselves but I don't want to see NSW go backwards,' she told Today.

'We're building for the future now, we've got a strong economy, we're helping taking pressure off families and that's where I want to see NSW (go) into the future.'

Mr Daley decided to cast his vote at Chifley Public School in Sydney's east.

And while most voters stick to the Australian tradition of opting for Democracy Sausage after casting their vote, Mr Daley was seen tucking into a meat pie instead.

Speaking to Sydney Morning Herald outside the school, he said the polls had been tight.

Voting, Australian style, where it’s considered tradition to buy a Democracy Sausage as you vote. This person went with the standard onion and tomato sauce

Voting, Australian style, where it’s considered tradition to buy a Democracy Sausage as you vote. This person went with the standard onion and tomato sauce

Ms Berejiklian was at Willoughby Public School, in Sydney's north, submitting her voting form. She opted for cupcakes over a sanga

Ms Berejiklian was at Willoughby Public School, in Sydney's north, submitting her voting form. She opted for cupcakes over a sanga

'(It was) easier 30 years ago when the voting patterns were different. People chop and change - that's not a bad thing. You have to work harder for that vote.'

Nearly 1.1 million people took advantage of early voting, with about one-in-five making their decision at pre-poll centres or via the post, internet or telephone.

A special Newspoll, published in The Weekend Australian, suggested the coalition is ahead of Labor 51-49 on a two-party preferred basis.

A similar result at the election would see Ms Berejiklian lose six seats, meaning she would need the support of at least one independent from the crossbench to form a government.

If the Coalition win on Saturday, it would be the first time since 1971 that a Liberal Party-led government in NSW had

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