More Ontario voters have cast ballots at advanced polls than during the last provincial vote in 2007.

According to Elections Ontario, 624,958 voters from across the province cast ballots in the advance polls which closed on Sept. 30.

The numbers show early voter turnout is up from the 451,949 electors who chose to cast early ballots four years ago. It is difficult to pinpoint, however, why advance voting is up in this election.

Advance polls, which opened on Sept. 21 this year, gave voters a 10-day window to cast their vote ahead of the Oct. 6 election date. 

  • Watch live election coverage on Thursday, Oct. 6 on CTV, and CTV News Channel starting at 9 p.m. ET.

With the election just two days away, eligible voters can still cast "Special ballots" by mail or in person at their local returning office.

Regardless of when votes are cast, recent polls suggest Thursday's election is going to be a nail-biter.

A Nanos Research poll for CTV, CP24 and the Globe and Mail puts the Liberals at 37.7 per cent support, with the Progressive Conservatives slightly behind at 33.2 per cent. The NDP follow at 25.8 per cent.

The poll, released Tuesday, has a margin or error of +/- 3.4 per cent.

Those numbers are only slightly different from figures released over the weekend, which also showed the Liberals and the Progressive Conservatives in a dead heat.

With voting day on the horizon, party leaders are making their final appeals for votes.

Both Liberal leader Dalton McGuinty and Tory leader Tim Hudak are working the hustings in southern Ontario on Tuesday.

New Democrat leader Andrea Horwath, on the other hand, plans to kick off her day at Queen's Park before heading north.

Horwath said her goal is to tell voters that they "actually have a choice" on voting day.

"The choice is a campaign that's been positive and a leader that'll put people first no matter what," she told CP24 on Tuesday before hopping on her campaign bus.