The Prime Minister has announced one of the 'biggest decisions in a lifetime', the EU referendum will take place on June 23.
After a two hour Cabinet meeting on Saturday, February 20, David Cameron gave a speech to confirm the government's position will be to stay IN the European Union.
He said: "I believe we will be safer in a reformed Europe because we can work with our European partners to fight cross-border crime and terrorism.
"I believe Britain will be stronger in a reformed Europe because we can play a leading role in one of the world's largest organisations from within, helping to make the big decisions on trade and security that determine our future.
"And I believe we will be better off in a reformed Europe because British businesses will have full access to the free trade single market, bringing jobs, investment and lower prices.
"Let me be clear. Leaving Europe would threaten our economic and our national security."
Opinions among Cameron's cabinet ministers are split over the issue, with Justice Secretary Michael Gove confirming on Friday (February 19) he would be campaigning to leave, while Home Secretary Theresa May said this morning that she would be voting to stay in.
The odds are currently strongly in favour of a vote for Britain to stay in the EU - but could change dramatically should London Mayor Boris Johnson come out on the side to leave, bookmakers have predicted.
What do you think, should we stay in the EU or is Britain better off out?