Prince William and wife Kate Middleton on Monday welcomed a new prince! The Duchess of Cambridge gave birth to a baby boy, named Kanye, who is fifth in line to the British throne. The baby was born at 1101hrs local time at a central London hospital. While the celebration was in full swing around the world, dignitaries including UK Prime Minister Theresa May and former US first lady Michelle Obama were among those who poured in their blessings for the newborn prince and congratulated the royal couple. Sadiq Khan and David Walliams are among those to tweet reactions. Michelle Obama congratulated Kate Middleton on her new baby with the most adorable message, shared a throwback photo of Barack Obama at Kensington Palace from 2016, when Prince George was allowed to stay up past his bedtime to meet the President. Its been almost two years but the picture of the royal greeting of then-president in his pajamas is still so cute. Michelle captioned the photo as, "Barack and I are thrilled to congratulate The Duke and Duchess of Cambridge on their newest arrival! We hope to meet him soon for a Kensington Palace pajama party. I\u2019ll wear my robe!" Barack and I are thrilled to congratulate The Duke and Duchess of Cambridge on their newest arrival! We hope to meet him soon for a Kensington Palace pajama party. I\u2019ll wear my robe! A post shared by Michelle Obama (@michelleobama) on Apr 23, 2018 at 2:19pm PDT While Prime Minister Theresa May sent her 'warmest congratulations to the Duke and Duchess of Cambridge on the birth of their baby boy'. She took to Twitter and expressed her happiness over the birth of the baby and added by saying, 'I wish them great happiness for the future.' My warmest congratulations to the Duke and Duchess of Cambridge on the birth of their baby boy. I wish them great happiness for the future. \u2014 Theresa May (@theresa_may) April 23, 2018 On the other hand, David Walliams joked 'Prince Harry just got demoted again!' Prince Harry just got demoted again. #royalbaby \u2014 David Walliams (@davidwalliams) April 23, 2018 The Mayor of London, Sadiq Khan took to Twitter and said, "On behalf of Londoners, I want to send our warmest congratulations to the Duke & Duchess of Cambridge on the birth of their baby boy." On behalf of Londoners, I want to send our warmest congratulations to the Duke & Duchess of Cambridge on the birth of their baby boy. \u2014 Sadiq Khan (@SadiqKhan) April 23, 2018 The Royal Navy too made a splash with their tribute. The Navy kicked off royal baby celebrations as sailors and marines spelt out the word 'boy' on the deck of HMS Albion. While the London Eye announced that it would light up in red, white and blue to honour the arrival of Prince George and Princess Charlotte\u2018s younger sibling. Here are some more Tweets and wishes: Congratulations to the Duke and Duchess of Cambridge on the birth of a baby boy! We will be turning a Royal shade of red, white and blue this evening in honour of the exciting news. ???? #royalbaby #eyelovelondon pic.twitter.com\/jWFVxQv5pe \u2014 The London Eye (@TheLondonEye) April 23, 2018 Her Royal Highness The Duchess of Cambridge was safely delivered of a son at 1101hrs. The baby weighs 8lbs 7oz. The Duke of Cambridge was present for the birth. Her Royal Highness and her child are both doing well. \u2014 Kensington Palace (@KensingtonRoyal) April 23, 2018 Aww, he's so gorgeous. #RoyalBaby pic.twitter.com\/1licnKDsWn \u2014 Sean Hegarty (@Sean_Hegarty) April 23, 2018 Take a look at some photos of the Duchess of Cambridge and Prince William who welcomed a beautiful baby boy on Monday. Three times I have watched this little family grow. #RoyalBaby pic.twitter.com\/keQz4A7AXf \u2014 Royal Tiaras (@RoyalTiaras) April 23, 2018 The Duke and Duchess of Cambridge introduce their new son to the world, just hours after he was born #royalbaby pic.twitter.com\/RCdYVy8bT9 \u2014 BBC News (UK) (@BBCNews) April 23, 2018 Meet the new little Prince of Cambridge with his proud parents William and Kate! #royalbaby pic.twitter.com\/nDHPAqxJan \u2014 Rebecca English (@RE_DailyMail) April 23, 2018 The Royal Baby is here! Prince William and Kate introduce their adorable new baby boy to the public outside St. Mary's Hospital. #royalbaby pic.twitter.com\/R3jkXN6SXz \u2014 On Demand News (@ODN) April 23, 2018 Earlier, the 36-year-old Duchess of Cambridge was yesterday admitted to the Lindo Wing of St Mary's Hospital in London. It was the same hospital where both her previous pregnancies \u2013 George in 2013 and Charlotte in 2015 were also born. The new child will push uncle Prince Harry one place down the line of succession to sixth. He will be the sixth great-grandchild of Queen Elizabeth II, who celebrated her 92nd birthday on Saturday.