An emotional Wilson then turned to his partner, who was smiling and sitting in the public gallery: "Ryan Patrick Bolger, will you marry me?"
Bolger gave his answer - "yes" - and it was met with warm laughter and loud applause.
The legislation was introduced Monday in House of Representatives and is expected to pass after breezing through the Senate last week by a vote of 43 to 12.
It's a bill that the majority of Australians support. Nearly 80 per cent of eligible voters responded to a national postal survey earlier this month, with more than 61 per cent saying "yes," the law should be changed to allow same-sex couples to wed, according to the Australian Bureau of Statistics. About 38 per cent said "no."
"The people of Australia have spoken, and I intend to make their wish the law of the land by Christmas," Prime Minister Malcolm Turnbull said at the time. "This is an overwhelming call for marriage equality."
The Senate passed the measure without any of the proposed amendments that would have provided legal protections to those who oppose same-sex unions on religious grounds, the AP reported.
The amendments aimed, for example, to give civil wedding celebrants the right to refuse to marry same-sex couples, according to the news agency.
"We must not fail to recognise that there is sincere, heartfelt anxiety about the bill's impact on religious freedom," the prime minister said, according to the AP. He added: "That is why I will support several amendments to the bill which will provide that additional reassurance in respect of their fundamental rights and freedoms."
If the House votes to support such amendments, the legislation would have to be returned to the Senate for approval before it could become law.
The Australian Broadcasting Corp. reported that following Wilson's proposal Monday, Deputy Speaker Rob Mitchell said that Bolger's reply should be noted in the record as "a 'yes,' a resounding 'yes.' "