Britain's government confirmed it will trigger Article 50, indicating Britain's departure from the European Union, on March 29.
The Department for Exiting the European Union said in a statement that Britain's permanent representative to the EU, Tim Barrow, alerted the European Council President Donald Tusk of the timing on Monday morning.
The notification of triggering Article 50 will come in the form of a letter, reported by Time. Brexit Secretary David Davis said in a statement that the country is "on the threshold of the most important discussion" for a generation.
In another report by L.A. Times, it said the document, carrying the signature of British Prime Minister Theresa May, included a formal notice that Britain is leaving the 28-nation European Union after more than 40 years of membership.
The country must resolve a number of issues with the remaining 27 EU nations, including trade and immigration deals, workers' rights and the terms for retirees and students to live and study overseas.
"The government is clear in its aims: a deal that works for every nation and region of the U.K. and indeed for all of Europe - a new, positive partnership between the U.K. and our friends and allies in the European Union," David said.
British Prime Minister Theresa May stressed that she was dedicated to securing the right deal for Britain as commonly known as Brexit during a speech in Wales on Monday. She said the June referendum in which voters favored leaving the European Union 52% to 48% was not just about exiting from the EU, but a call for a "change in the way the country works."
The developments have also concurred differences in thoughts within the United Kingdom - England, Northern Ireland, Scotland and Wales. Scottish First Minister Nicola Sturgeon has called for a second independence referendum within two years, once the full terms of the Brexit deal are confirmed, but it was rejected by May.