It seemed like it would never come but the day is finally upon us. After months of rallies, reaction and general ridiculousness we’re on the cusp of finding out who will be the 45th President of the United States.
We'll be covering the night's events with our live updates story as well as a live blog which will capture the social media reaction.
So here’s a guide to how the result of the US presidential election will be decided and how the events will unfold:
What will actually happen today?
Polls open at different times across the United States and will remain open for most of the day.
In many states people have been able to vote in advance and it is estimated at least one-third of all votes will have been cast before today.
What happens when the polls close?
The main US TV networks will “call” each state for either Hillary Clinton (Democrat) or Donald Trump (Republican).
Most states vote the same way each election and these will be called as soon as their polls close. Examples are New York and California for the Democrats, and Louisiana and Tennessee for the Republicans.
Which states will be called first?
Indiana and Kentucky (polls close 11pm Irish time). Both of these are safe Republican states, so these ought to be called for Trump straight away.
Polls in the rest of the states will close over the next few hours, ending at 4am.
Which states are worth watching out for?
The so-called “swing states”, which tend to vote different ways in each election. Neither Clinton nor Trump can win without taking at least some of these states.
Here is when these polls are due to close (Irish time): Florida and New Hampshire 12am; North Carolina and Ohio 12.30am; Arizona and Colorado 2am; Iowa and Nevada: 3am.
Who currently has the advantage in these states?
Polls suggest Clinton is ahead in most of them, but not by much. She also has a slightly easier route to victory than Trump.
If she holds all of the “safe” Democratic states, a win in Florida could be enough to see her over the finishing line. Trump needs to take almost all of the swing states to get him past the winning post.
What is the winning post?
270 electoral votes.
And what are electoral votes?
Usually by the loser conceding defeat. The actual process of counting votes takes many hours, sometimes days. If the overall result is close, do not expect anybody to concede any time soon.
Is there a cut-off point when the result has to become official?
Yes – January 6, 2017. This is when the US Congress meets to count and authorise the electoral votes.
And Barack Obama stays in office throughout this period?
Yes, until 12pm on January 20 2017 when the president-elect will take the oath of office and become the 45th President of the United States.