Boris Johnson married Carrie Symonds in a top secret ceremony.
The couple reportedly took vows in front of a small group of close friends and family at Westminster Cathedral.
Downing Street did not want to comment on the reports, but Tory MPs and ministers congratulated the couple.
A staff member # 10 said, “I was strictly told not to comment.”
The Sun reported that even senior Downing Street officials were completely ignorant that the couple would tie the knot on Saturday.
The couple announced their engagement – along with news that they were expecting their first child – in February last year.
It is Mr Johnson’s third marriage after divorcing his second wife, Marina Wheeler, in 2020.
He and wife Symonds have a son, Wilfred, who was born in April 2020.
The wedding ceremony at the Catholic Cathedral was conducted by Father Daniel Humphreys, who gave directions to the couple prior to marriage and baptized Wilfred last year, The Sun reported.
Shortly after 1:30 p.m., the cathedral was suddenly evacuated by visitors and staff said it would be locked, the newspaper said.
Half an hour later a limousine drove the bride to the piazza in front of the main entrance to the west.
Ms. Symonds wore a long white dress but no veil, while Mr. Johnson wore a “very elegant” suit.
The ceremony signified that Mr Johnson was the first Prime Minister to marry in office since Lord Liverpool married Mary Chester in 1822.
The wedding comes just days after the couple reportedly sent save-the-date cards to family and friends for a festive event on July 30, 2022.
England weddings are currently subject to strict coronavirus restrictions.
Ceremonies for up to 30 people are allowed in Covid-safe rooms.
Wedding receptions for up to 30 people in a Covid-safe venue or outdoors are also allowed.
Dancing is not recommended due to the increased risk of infection, with the exception of the couple’s traditional first dance.
Johnson’s father Stanley was spotted on Downing Street after the ceremony while guests and musicians left # 10 on Saturday night.
The wedding comes at the end of a difficult week for the Prime Minister, during which his former advisor Dominic Cummings branded him incapacitated.
The former advisor to the prime minister said Ms. Symonds was desperately trying to oust him from his role as Mr. Johnson’s right-hand man and trying to bring her own friends into key positions.
Mr Cummings also claimed that in February 2020, as the pandemic turned into a major global crisis, Mr Johnson “was distracted by the conclusion of his divorce, his girlfriend wanted to announce her pregnancy and engagement, as well as his finances”.
Cabinet Minister Therese Coffey congratulated the couple “on their marriage today”.
The Minister for Children and Families Vicky Ford sent her congratulations and “great love to Wilf”, adding: “So many weddings have been delayed and disrupted by Covid. Life is always better with love. ”
Northern Ireland’s First Minister Arlene Foster tweeted: “Congratulations to Boris Johnson & Carrie Symonds on your wedding today.”
But former Labor frontbencher Jon Trickett said the wedding was “a great way to bury this week’s bad news,” adding to Mr Cummings’ testimony, the spread of India’s variant of coronavirus and the dispute over funding the Downing Street apartment.
Labor colleague Tonia Antoniazzi suggested that the “emergency marriage plan” was an attempt to “distract from the negative press” by Mr Cummings.
She added, “You know he won’t have a plan in Checkers because he won’t be PM next year …”