Labour has secured a much-anticipated election victory - putting them in government for the first time in 14 years.
But what actually needs to happen for the exchange of power?
From car journeys to Buckingham Palace to packing up Downing Street, selecting a cabinet and getting parliament in business, Sky News looks at what happens now.
Off to see the King
Rishi Sunak has made his last journey as prime minister as he travelled to visit the King at Buckingham Palace to tender his resignation.
The King has accepted the resignation, Buckingham Palace confirmed.
After Mr Sunak's exit, it was time for Sir Keir Starmer to arrive, just before midday on Friday.
He would have received a call from Buckingham Palace in advance of the meeting, giving him a time or telling him to "stand by".
Sir Keir was then asked by the King to form a new government - it's at this stage that Sir Keir officially became prime minister.
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This meeting is historically known as "kissing hands", although the incoming prime minister no longer does this... a bow and handshake will do.
Read more: Who is your local MP now? Find out here
When do we get a new cabinet?
The cabinet is the PM's top team, made up of 22 ministers with responsibility for specific areas, including the economy, education and culture.
Sir Keir already has his shadow cabinet waiting in the wings.
After the last Labour reshuffle in September 2023, he indicated this would be the team he would take into government - saying the party had "a strong team on the pitch that is ready to deliver the change our country desperately needs".
There may be some changes, but we won't have to wait long to find out. Sir Keir will start naming his cabinet soon after he's confirmed as PM.
When does Sir Keir move into Downing Street?
Sir Keir travelled to Downing Street after he met with the King at Buckingham Palace and gave his first speech as prime minister.
"Our country has voted decisively for change, for national renewal and a return of politics to public service," he said.
He said Labour has been given a "clear mandate" - which the party will use to "deliver change".
He said this will "end the era of noisy performance, tread more lightly on your lives, and unite our country".
He then entered Number 10 to applause from staff.
Sir Keir has not yet indicated whether he will follow Mr Sunak's lead and live at Number 10, or copy a string of prime ministers going back to 1997 and take the larger flat above Number 11 instead.
Whatever he chooses, new prime ministers do not always move in immediately.
When the Conservatives took power in 2010, it was three weeks before the Cameron family moved to Downing Street.
It took Theresa May a week to settle in, while Boris Johnson gave it five days.
When does Rishi Sunak move out of Downing Street?
Mr Sunak will move out of Number 10 immediately.
Who could be the next Tory leader?
Mr Sunak has announced his resignation as leader of the Conservative Party - and the race is on to find his replacement.
So who is likely to throw their hat into the ring, what do they believe in and, crucially, do they have the backing of party members?
Read our guide to the runners and riders for an introduction to the main potential players.
When is the new parliament meeting?
The new parliament will meet for the first time on 9 July.
One of its first tasks will be to elect the Speaker of the House Commons, a role held by Sir Lindsay Hoyle before parliament was dissolved pre-election.
The swearing-in of MPs will start then and can take two or three days.
MPs can only take their seats, take part in votes and debates and receive a salary once they have taken the oath or affirmation of allegiance to the King.
Read more:
Labour's landslide in maps and charts
Meet Victoria Starmer, new PM's wife
Who won the popular vote?
Then on 17 July, the state opening of parliament and the King's Speech will mark the official start of the new parliament.
The King's Speech is actually written by the government and gives it the opportunity to set out its priorities, including the laws it wants to get through parliament in the coming year.
After a break, the King's Speech is followed by speeches by the prime minister and leader of the Opposition, and a debate. It culminates in a vote, which is largely symbolic - it's rare for a government to lose it.
Does the new government have to hold a budget?
A budget is needed if the government wants to raise taxes - something Labour pledged not to do for "working people" in its manifesto.
The party has ruled out increases to income tax, national insurance, corporation tax or any form of wealth tax.
Emergency budgets sometimes take place after general elections so the new government can announce changes to taxes and spending.
But in June, then shadow chancellor Rachel Reeves ruled out an emergency budget soon after the election.
She said Labour would "do things in a proper way", indicating a budget would be announced some time around September.
The Office for Budget Responsibility requires 10 weeks' notice to prepare an independent forecast ahead of a budget and Ms Reeves committed to not delivering a fiscal event without an OBR forecast.
When does recess start?
Parliament's summer recess is a period when neither the House of Commons nor the House of Lords meets to conduct business.
It normally runs from late July to early September. The exact dates of this year's break have not yet been announced.
Parliament would normally wrap up after the King's Speech, due to take place on 17 July.
But before the election, Labour indicated it would push back the summer recess for MPs until the end of July.
What will be at the top of Sir Keir's in-tray?
On day one, Sir Keir will meet the cabinet secretary, take some sobering moments to write the four "letters of last resort" every new prime minister must write to the commanders of Britain's nuclear submarines in the event of a deadly attack, and then get on with appointing his cabinet.
Fickle voters hand Labour a 'loveless landslide'
Sam Coates
Deputy political editor
In the last few hours, this country has witnessed a peaceful political revolution and Sir Keir Starmer will begin work as prime minister after a landslide which seemed inconceivable barely three years ago.
From today, and for the next five years, our 58th prime minister will have a total command of the Commons, after a result in line with Tony Blair's historic Labour victory of 1997 - which at time of writing looks like a majority just shy of 170.
Sir Keir has been given, in the eyes of many, a political blank cheque from which he will be expected to enact a promise of change - change from the status quo which an analysis of votes all over the country suggests the public are demanding with exceptional clarity and urgency.
Read more analysis from Sam here
His chief of staff Sue Gray has been working intensively on preparing for government, including on a "sh*t list" of tricky issues they will have to tackle.
Among them is the prisons crisis, with UK jails nearly full and prison governors warning of public disorder if places are not freed up.
Public sector pay will be an early priority, with junior doctors going on strike the week before polling day and Labour promising to thrash out a resolution.
Universities say they are struggling to stay afloat and calling for an increase in fees, while Britain's biggest water company Thames Water is at risk of financial collapse.
Recommendations for new pay settlements with nurses, teachers and other public sector workers are traditionally agreed in July and will be at the top of cabinet ministers' inboxes, with the Institute for Fiscal Studies estimating these could cost £6-£7bn immediately.
Within days, the new prime minister heads to NATO's 75th-anniversary summit in Washington - still in the glow of victory.
