Federal Parliament has voted to legalise same-sex marriage.

So far there have been proposals when the result of the postal survey was announced, and another during the House of Representatives debate on the bill to legalise same-sex marriage.

Let's take a look at when you can expect to see the first marriages start to take place.

What's the date of Australia's first same-sex weddings?

The first legal same-sex weddings in Australia could happen about January 8, 2018.

Why is early January, 2018 our best case scenario?

The House of Representatives passed the same-sex marriage bill today.

That means the Governor-General could ratify the law from tomorrow, making same-sex marriage legal. That would meet Prime Minister Malcolm Turnbull's hope to get it done by Christmas.

These guys got engaged yesterday. But they'll have to hold off on the Save the Dates.... ( ABC News: Riley Stuart )

There's still a one-month wait

If you want to get married right now, you have to lodge a Notice of Intended Marriage form with your celebrant or minister at least one month before you tie the knot.

So if we're working off a December 8 date, the first legal same-sex weddings in Australia could happen around January 8, 2018.

And Attorney-General George Brandis agrees.

Previously, he told AM he expected the "beginning of next year" was when we'll see the first same-sex weddings.

Can I book my same-sex wedding now?

There's nothing stopping you from booking a wedding for 2018.

FWIW, the Attorney-General's office has previously confirmed with the ABC that Notice of Intended Marriage forms could not be lodged until the same-sex marriage law was passed, which happened today.

But it's always best to clarify all of the details with your celebrant or minister.