Britain could be facing a hung parliament for the first time in seven years, if the results of the General Election exit poll turn out to be accurate.
That would come as a huge shock to Conservative leader Theresa May, who called the election with the intention of increasing her majority - not losing it.
It remains to be seen if the exit poll prediction comes to fruition, bit if it does, the Prime Minister would have a number of difficult decisions to make about her future.
What is a hung parliament?
A party needs to reach the magic 326-seat mark to win a majority, so when that doesn't happen the Parliament is said to be "hung".
The exit poll predicts the Conservatives will only make 314 seats, meaning they would be facing a 2010 scenario where they had to find an alternative way of forming a government.
On that occasion, they went into coalition with the Liberal Democrats - although the chances of that happening again this time are slim.
Could a coalition happen?
It's unlikely because the Liberal Democrats have already made it clear they wouldn't do a deal.
ITV News expert Professor Jane Green suggests that if the numbers in this exit poll are right it could prove tricky for either the Conservatives or Labour to form a coalition with the smaller parties anyway.
If no coalition deal can be reached, one of the party leaders could try to run a minority government - but that would mean they'd have to rely heavily on the support of smaller parties to get their laws through the Commons.
That rarely works, so a fresh general election could be on the cards in the hope that a majority would come to the surface then.