From 11am this morning, Prime Minister Julia Gillard will take part in a Google+ hangout, answering questions from gay marriage champions, military veterans and atheists opposed to chaplains in public schools.

You can watch the live, one-hour all-digital interview at Deakin University's YouTube page.

Tweet your questions and comments to #pmhangout.

The initiative is a first for an Australian Prime Minister and a collaboration between Fairfax Media, OurSay and Deakin University.

Shane Bazzi, David Jamison and David Nicholls will quiz the Prime Minister in the live video chat room after their questions garnered the most votes on the OurSay.org website.

Shane Bazzi, 25, from Sydney, topped the poll with more than 12,700 votes, and will ask the Prime Minister to explain her opposition to gay marriage given she is as an atheist and leader of a "self-described socially progressive party".

"Why are heterosexual relationships more valued than same-sex relationships?” he asked.

David Jamison, the national president of the Defence Force Welfare Association, came in at second place with a question demanding a higher rate of indexation for veterans pensions - contrasting their situation with the indexation rate on the old age pension.

In third spot was South Australian David Nicholls, 67, who is president of the Atheist Foundation of Australia.

Mr Nicholls wants to ask the Prime Minister about federal funding of school chaplains, believing it has no place in a secular democracy.

Other people from the OurSay website and the Twitter hashtag #pmhangout will also join the conversation.

The virtual chat will be facilitated by The Sunday Age's national political editor Misha Schubert.

By the close of voting at 5pm on Thursday, more than 109,000 votes had been cast for more than 2000 questions lodged with OurSay.