The Prime Minister is to deliver a speech calling for Scots to vote against independence.
David Cameron is using a major speech today to call on the rest of the UK to speak our against independence for Scotland.
The Prime Minister will set out a positive vision for the future of the UK, urging people in England, Wales and Northern Ireland to use their voice - even if they don't have a vote.
Speaking at London's Olympic Park, Mr Cameron will say the decision to stay in the UK is one solely for the 4 million people of Scotland.
But he says it affects 63 million in the UK, who could wake up on the 19th of September in a different country, with a different future ahead of it.
The UK would be deeply diminshed without Scotland.
And although the rest of the UK doesn't have a vote - the prime minister says they do have a voice, and influence.
Deputy First Minister Nicola Sturgeon has described the move as 'shameful' and a 'political ploy'.