What Boris can expect in days to come
Here is a look ahead to what Boris Johnson's first week in government could entail.
Today: The Prime Minister will be considering his new Cabinet. A reshuffle could last over the weekend, or be done in a day as it was when he took over from Theresa May.
December 17: MPs will return to Westminster and begin the process of swearing in, where they take an oath of allegiance. The process usually lasts a few days, but will be rushed through in two days to allow for a Queen's Speech before Christmas.
December 19: The Queen will formally open Parliament on Thursday, but with "reduced ceremonial elements".
The last state opening took place on October 14, 10 days before Mr Johnson made his successful call for the general election to take place.
December 20: The Conservatives have pledged to re-introduce Mr Johnson's Withdrawal Agreement Bill, which would ratify the deal with Brussels, in December as an "early Christmas present" for voters.
This could mean MPs sitting on Friday in order for the Bill to be introduced at first reading.
January 2020: Assuming Parliament rises for its usual Christmas recess, MPs would be back in Westminster in early January to pass the Brexit Bill.
They would have just a few weeks to get the legislation through both houses before the January 31 deadline.