"The PM and Ms Symonds would like to thank the fantastic NHS maternity team," Downing Street said.The Queen has sent a private message of good wishes to the couple to congratulate them on the birth of their son, Buckingham Palace said.The PM's weekly audience with the the Queen is due to take place later by telephone.Mr Johnson, 55, and Ms Symonds, 32, announced in March that they were expecting a baby in "early summer", and that they had become engaged at the end of last year.They are the first unmarried couple to move into Downing Street together.The baby is Ms Symonds' first child, while Mr Johnson is known to have fathered five.The family are planning to continue living in the flat above Number 11 Downing Street and it's understood their dog, Dilyn, will also be remaining in residence.Mr Johnson returned to work on Monday, after a battle with coronavirus which saw him spend three nights in intensive care. His youngest son, Leo, was born three years later in May 2000.The arrangement worked out especially well as Gordon Brown, the then Chancellor, was single at the time. ".Labour leader Sir Keir Starmer also offered his congratulations on the "wonderful news".Whatever their political differences, he said at Prime Minister's Questions, "as human beings I think we all recognise the anxiety that the prime minister and Carrie must have gone through in these past few weeks - unimaginable anxiety. Tom Cruise will blast into space aboard a Elon Musk-owned SpaceX rocket in October 2021 to make a movie on the ISS with NASA,GOP Lieutenant Governor is BOOED at Trump's Ohio rally after he encourages the president's supporters to wear face masks amid the COVID-19 pandemic,Donald Trump ignores question about the U.S. hitting 200,000 coronavirus deaths and then calls it 'a shame' - after rival Joe Biden tweeted about the milestone for hours. ',October: Carrie pictured at the State Opening of Parliament in Westminster on October 14,November: Boris and Carrie in Downing Street arriving for the Remembrance Sunday service at the Cenotaph memorial in Whitehall on November 10,December: The couple pictured celebrating the election win on December 12,December: The couple attending Evgeny Lebedev's Christmas Party on December 13,March: Mr Johnson and Miss Symonds at the England v Wales rugby match at Twickenham on March 7, just before Mr Johnson contracted coronavirus,David Cameron holding his baby daughter, Florence.David Cameron and his wife Samantha had daughter Florence just three months after her father entered into coalition with the Liberal Democrats.Florence Rose Endellion was born weighing 6lb 1oz while the Camerons were enjoying a family summer holiday in Cornwall.The former Tory Party leader spent the night in the Royal Cornwall with Samantha, where Florence, now nine, was delivered by caesarean.She was Mr Cameron's fourth child. Well, These Are The Best Hair Clippers You Can Buy Right Now,NBA commissioner Silver: Best guess next season won't start until January,Sellers lose more than £600m a year in property ‘fall throughs’,NASA and US Space Force team up for planetary defense, moon trips and more,Helen Flanagan says her morning sickness is ‘on another level’ during pregnancy with third child,Watch Ferrari F8 try to take down McLaren 720S in the quarter mile,Sea-level rise could claim 40% of beaches on Hawaii’s most visited island by 2050,Learn the craft of fermentation from an expert,MPs back lockdown day - March 23 - to be enshrined as day of mourning,Lucas 'out-bants Fielding as the invincible GBBO returns',Love Island's Olivia Bowen looks chic in green top and white trousers,Frank Lampard challenges Callum Hudson-Odoi to 'flourish again',Nike shakes off pandemic blues with surging online sales,Everything we know about The Elder Scrolls 6, from Xbox exclusivity, game engine, and more,Boris Johnson's speech in full: PM's lockdown address to the nation,2020 Range Rover Velar arrives with new PHEV powertrain,Turkish police investigate ‘suspicious’ death of Russian-US journalist,Stacey Solomon and Joe Swash take new camper van on shopping trip after she brands it a ‘monstrosity’,Major questions about effectiveness of contact tracing app left unanswered, charity warns,Ginsburg movies 'RBG' and 'On the Basis of Sex' re-released to support women's rights.What is the best anti aging cream on the market?Watch how Micah Richards made it just in time to help present MNF,Stuck working from home again?