People aged 18 and over are being urged to ensure they are registered to vote.
It comes as the possibility of Prime Minister Boris Johnson calling a general election before Christmas becomes increasingly more likely.
The UK looks set for a December election after Labour leader Jeremy Corbyn announced on Tuesday that he was prepared to back it, saying his condition of taking a no-deal Brexit off the table had now been met after the EU agreed to extend the Brexit deadline until 31 January 2020.
To vote in a general election, you must be 18 or over on polling day, be a British, Irish or qualifying Commonwealth citizen, be a resident at a UK address or a British citizen living abroad who has been registered to vote in the UK in the last 15 years, and not be legally excluded from voting.
To register to vote or check your details, visit https://www.gov.uk/register-to-vote. The process will take around five minutes.
There's been a lot of talk about whether 16-year-olds in England, Wales and Northern Ireland will get the vote.
With the exception of the Conservative Party, political parties like Labour, the Liberal Democrats and SNP all supported lowering the voting age to 16 in the last election in 2017.
But it's almost certain that 16 and 17-year olds won't be able to vote if a snap election is called.
The Electoral Commission - which is the body that oversees elections in the UK - says it would take six months to make sure a new group of voters could be registered and eligible to vote in an election.