That's were we'll leave the live coverage. But we'll continue to keep you across the story today as supporters, commentators and those opposed react to the passing of the bill.
You can stay up to date via the homepage and you can read a wrap of how the debate unfolded here.
Thank you for joining us.
Lisa Cox: There have been tears ad hugs as marriage equality supporters celebrate the passage of the bill. Some have held up rainbow-coloured "thank you signs.''
Under a "pair'' arrangement, Liberal MLA Andrew Wall abstained to allow Ms Porter to leave the chamber.
Law professor George Williams says the ACT Marriage Equality Bill fills in the gaps not covered by federal marriage law, and so will authorise not only same-sex people to marry but also transgender and intersex people.
High Court awaits same-sex marriage legislation
According to constitutional law expert Professor George Williams, the legal challenge to the ACT marriage equality legislation will be a question of federalism not human rights.PT7M17S http://www.canberratimes.com.au/action/externalEmbeddedPlayer?id=d-2vxuc 620 349 October 22, 2013
Tom McIlroy: Social media reaction to the bill's passing is coming thick and fast.
Actually that final vote was eight votes to seven, because Labor MLA Mary Porter had to step out of the chamber.
And the historic same-sex marriage bill passes the ACT Legislative Assembly by eight votes to seven.
Lisa Cox: Mr Rattenbury says the government will continue to consider all the legal advice. Can we expect more amendments after the bill is passed?
Liberals are opposing a bid by Labor for last-minute amendments to be debated. Liberal Leader Jeremy Hanson says the 25 amendments should have been sent to the scrutiny of bills committee before being considered by the full chamber.
Assembly votes by nine votes to eight to give in-principle support for the bill. Now on to the detail stage of the debate.
Lisa Cox: The Assembly is now voting on whether to support the bill "in-principle''. Assuming the vote passes, they will then discuss the details of the bill.
Mr Corbell says "no one should believe the myth of separate but equal'', referring to segregation in the United States and apartheid in South Africa.
Mr Corbell is now outlining amendments designed to reduce the chances of the bill being declared unconstitutional.
Some marriage equality advocates believe more amendments are required to reduce the chances of the High Court throwing out the law.
Mr Corbell says the ACT law can operate concurrently with the federal Marriage Act.
"It is not a challenge to the Commonwealth's power to legislate for marriage.''
Mr Corbell compares the inability of same-sex couples to past discrimination against women. He points out that women were long denied the right to vote.
"This demonstrates the absurdity of the situation we are in.''
Mr Corbell says the government is determined to push ahead with the reform.
''No legal contrivance will turn us from this purpose.''
Mr Corbell says Australia cannot be a civillised country if people were bound by laws that discriminated against them.
Labor MLAs Yvette Berry and Mick Gentleman have also spoken in support of the bill.
Final Labor speaker Mick Gentleman: I'm confident I'm standing on the right side of history— Lisa Cox (@_LisaMCox) October 22, 2013
ACT govt is the most progressive in the country with these reforms says Gentleman— Lisa Cox (@_LisaMCox) October 22, 2013
Attorney-General Simon Corbell is now summing up before amendments are discussed.
On the assumption that this bill becomes law - and barring a big last-minute surprise it will - it is heading for the High Court.
Federal Attorney-General George Brandis has confirmed the Abbott government will challenge their constitutional validity.
Of course, marriage equality advocates say a new report from Tasmania shows states and territories do have constitutional power to legislate for same-sex marriage.
Senator George Brandis. Photo: Steven Siewert
No further Liberal MLAs are expected to speak on the bill.
Labor MLA Mary Porter says the fact that that she has a gay neice, "Only adds to my determination to fight for this bill.''
Education Minister Joy Burch has attacked Liberal MLAs for voting against giving same-sex couples the right to marry.
"Today you have personally let them down.''
Labor MLA Chris Bourke is also speaking in support of the bill.
Deputy Chief Minister Andrew Barr has choked back tears while describing "the sacrifice and the struggle'' of gay and lesbian Canberrans, their families and supporters.
Deputy Chief Minister Andrew Barr begins his speech. Photo: Rohan Thomson
Lisa Cox: Members of the public in the Assembly foyer and reception room cheer as Ms Gallagher concludes her comments and Deputy Chief Minister Andrew Barr, who is gay, prepares to speak.
Ms Gallagher says the law will be operational before the end of the year.
Interstate same-sex couples will be welcome to marry in the ACT.
Clergy will not be required to conduct same-sex marriages if this is contrary to their beliefs.
Ms Gallagher says the threat of a High Court challenge will not deter the government from proceeding with the establishment of a local same-sex scheme.
"That should not deter us, it doesn't rattle us and it doesn't change our path.''
Chief Minister Katy Gallagher. Photo: Rohan Thomson
Chief Minister Katy Gallagher has begun her speech by saying marriage equality is necessary to end discrimination against same-sex couples.
"It's a proud day for the government and I know for many across our community,''she says.
"We on this side of the chamber are prepared to challenge outdated legal notions and meet our responsibilities to the people we represent, to make sure that each and everyone of you is treated with recognition, equality and fairness before the law.
"These are the principles that have brought us into government, they're the principles the community holds dear, they're the principles of ACT Labor and they are the principles of this bill.''
Tom McIlroy: We're seeing a lot of support on social media for the ACT's same-sex marriage legislation, but not everyone agrees on the reforms.
@ShaneRattenbury Do the responsible thing and say NO to gay marriage— Greg Hutcho (@ghutchi) October 21, 2013
We'll bring you more reaction as it happens during this morning's debate.
Mr Rattenbury says if the marriage equality law is struck down by the High Court, "we will try again''.
He has quoted a constituent saying that instead of being a place associated with "fat cats'', the ACT should be "rainbow territory''.
Mr Rattenbury has received a round of applause after concluding by saying, "enjoy getting married''.
Speaker Vicki Dunne has warned members of the public in the gallerry not to interject and participate in the debate.
While the Assembly will decide whether this legislation gets up or not, we want to know your views. Tell us in the comments what you think of the legislation and the debate (but keep it respectful) or vote in our poll.
Poll: Do you support the ACT's same-sex marriage legislation?
- Yes. It's about time same-sex marriage was legalised in Australia.
- No. I believe marriage is between a man and a woman.
- No. I back same sex marriage, but the ACT shouldn't be doing this - it's a federal matter.
Total votes: 7759.
You will need Cookies enabled to use our Voting Feature.
Poll closed 26 Oct, 2013
These polls are not scientific and reflect the opinion only of visitors who have chosen to participate.
The Australian Medical Students’ Association and ANU Medical Students’ Society have this morning praised the same-sex marriage bill, declaring marriage equality to be a health issue.
In a statement, Medical Students’ Association president Ben Veness said discrimination had negative health effects.
“Marriage equality is a health issue,” Mr Veness said.
“Discriminatory legislation, such as denying people the right to marry, have been shown to have negative health effects, with significant increases in psychiatric disorders.
"Conversely, there is no health argument in favour of defining marriage as a union solely between a man and a woman.’’
Mr Rattenbury has urged people who oppose same-sex marraige to, "looking into your hearts, think of the people who want this change., who have been living with this discrimination.''
He has also criticised the Liberal Party for opposing the bill on the grounds that marriage is a federal matter.
"Frankly it seems like an excuse to avoid addressing the issue at hand. Today is the day to put a view on this. In some regards, I have more respect who are open in saying that they oppose marriage equality than I do for those who seek to hide behind process or jurisdictional arguments.''
Mr Rattenbury says the bill will put an end to a form of discrimination against same-sex attracted people.
"This is the beginning of governments in Australia saying 'no' to the historical institutionalised discrimination that relegates same-sex couples to a second-class status
"Denying equal marriage rights to same-sex couples is an afront to human rights which says, 'you're not allowed to express or formalise your love in the same way as other couples in our society.
"From today, through the passage of this bill, the ACT puts an end to this form of discrimination.''
Even our elite athletes are interested in today's debate. Well, Brumbies star and social campaigner David Pocock is.
Exciting day for #MarriageEquality in the ACT with the 'Marriage Equality Same-Sex Bill' set to be passed in the Legislative Assembly.— David Pocock (@pocockdavid) October 21, 2013
Greens MLA Shane Rattenbury, who is a minister in the ACT Government, is now speaking in support of the bill.
He is being watched from the gallery by federal Greens Leader Christine Milne.
Mr Hanson questioned whether amendments to be moved by Attorney-General Simon Corbell would ensure the bill was constitutional.
"It is a leap of faith now to accept Simon Corbell's assurances that the amendments will make this bill lawful when he's spent the last few weeks arguing against the ned for any such amendments.
"The Canberra Liberals have a different view about the role of the ACT Legislative Assembly to the Labor Party and the Greens.
"We do not see the ACT Assembly as a vehicle to drive national agendas or social agendas, whereas the Labor Party and the Greens do. We are labor's smallest parliament in a small jurisdiction and we do not think a majority of one person in the ACT should change the definition of marriage for a country of over 23 million people.''
We're getting our first photos through of the viewing room - looks like there are plenty of people there.
Canberrans gather at the ACT Legislative assembly for the beginning of the same sex marriage bill debate. Photo: Rohan Thomson
Mr Hanson is quoting legal advice that the ACT bill is likely to be overturned by the High Court.
"This is not a responsible thing for the Assembly to be doing.''
He also says the bill "is a bandwagon hurtling towards a cliff.''
Mr Hanson is also quoting from marriage equality supporters who are concerned that the bill needs further amendments to strengthen the chances the High Court will declare it to be constitutional.
Liberal Leader Jeremy Hanson has now begun speaking on the bill.
"We believe that this issue belongs in the Commonwealth Parliament,'' Mr Hanson said.
"It is a federal issue and there are a wide-range of sound legal opinions that support that position.''
Liberal Leader Jeremy Hanson. Photo: Rohan Thomson
Green Shane Rattenbury is one of the MLAs backing the bill. Looks like he's excited to get underway.
Let the debate begin !— Shane Rattenbury (@ShaneRattenbury) October 21, 2013
The marriage equality bill was introduced into the Assembly by Labor Attorney-General Simon Corbell on the 16th of September.
Labor officially has a conscience vote on the issue, but all eight ALP members plan to vote for the bill.
Greens minister Shane Rattenbury also supports it.
The eight Liberal MLAs are expected to vote against the bill, although their are different views within the opposition partyroom about gay marriage. The Liberals argue that marriage laws are a matter for the Federal Parliament and should not be debated in the Assembly.
Assembly Reporter Lisa Cox reports the gallery is already filling up. Looks like it's going to be a busy day at the Legislative Assembly.
Same-sex marriage debate soon to begin in ACT Legislative Assembly. The public gallery is already packed with supporters #actpol— Lisa Cox (@_LisaMCox) October 21, 2013
Lisa Cox: We just spoke to Andrew and Shane from Gympie in Queensland who are at the Assembly to watch the debate.
Andrew says, "We were touring around on holiday and we saw this was happening on the Facebook feed.
"It's out last day in Canberra, we've six hours before out plane heads out so we thought we would watch what happens.''
The couple, together for four years said, "It's a step in the right direction.''
"But it's like an onion,'' Andrew said. "There will be more layers to this.''
Good morning and welcome to our coverage of the marriage equality bill in the ACT Legislative Assembly.
The 17-member Assembly is expected to pass during the next few hours, making the ACT the first Australian jurisdiction to permit same-sex marriage.
We’ll be providing gavel-to-gavel coverage.
The federal government believes the bill is unconstitutional and is planning to challenge it in the High Court of Australia.
But that hasn’t dampened the spirits of same-sex marriage supporters who have been lining up to get seats in the public gallery. Those who can’t find seats in the gallery will watch proceedings on a big screen in a function room, which has been decked out to resemble a wedding reception.