Hundreds gathered to catch a glimpse of the future king
They came from all over the world to catch the first glimpse of the baby prince and with excitement levels at their peak the atmosphere was electric and onlookers were "overwhelmed".
Tourists and royalists lined the pavement outside the Lindo Wing and as the world's press sat poised to capture the moment the Duke and Duchess of Cambridge emerged with their baby, an almighty cheer rang out as they appeared on the steps.
It was the moment everyone had been waiting for and it did not disappoint, with ecstatic onlookers describing the history-making event as an "amazing" experience.
Rebecca Brady, a research midwife at the Women's Health Research Centre at Imperial College London, was one of the medical staff invited to stand near the Lindo Wing's entrance and said she will never forget it.
"I was overwhelmed. It was so special to see a big part of history," she said.
She described the royal couple as "just natural, happy, just like us".
She added: "It was about savouring the moment. I'll remember it until the day I die."
Her colleague Lisa Sharpe, also a research midwife, said there was a "lovely buzz" and said she would have "goose-bumps for the rest of the evening".
She said: "Every birth is a joyful experience. There's been a fantastic buzz.
"Lots of well-wishers and members of the public. Just a lovely, lovely experience. I'll have goose-bumps for the rest of the evening.
She said the battery on her phone died so she was unable to take a picture but she said it was "all about absorbing the moment".
Midwife Marie Hall thought Kate looked beautiful as she addressed the press for the first time as a mother, saying: "Pregnancy always does make you blooming."
Shereen Jones, a lead midwife at the NHS,was bowled over by the occasion, saying: "Incredible. Very, very exciting."
Austrian couple Karl and Anna Ortner had their cameras at the ready and were delighted to be in the right place at the right time.
"It was absolutely gorgeous to be in the middle of the crowd, and to feel the emotions of the people.
"It was a great experience for me," said Mrs Ortner.
Her husband said: "It's quite interesting to see it, and as the Austrians don't have a king we have to go to Britain to see such things."
Gabriela Barzyk, from Poland but who now lives in London, thought Kate looked "wonderful" and handled the moment with poise.
"It was amazing. It was really exciting. I think Kate looked wonderful.
"She looked really great and you couldn't see any nerves," she said.
As the royal vehicles left the street, people were still arriving in the hope that they had not missed the big reveal.
One unlucky latecomer was 10-year-old Lavine Karim, from Iraq, who was asking a policewoman to pass on a card she had made for Kate.
On the policewoman's advice, Lavine said she will post the card which said 'Congratulations Kate for your baby'.
Asked about why she was so interested in Kate, Lavine said: "She's the princess of London and I'm really excited for her, and she's very beautiful.
"I made her a card, and I've got a toy for her baby and a necklace for her.
"She's a perfect princess."
Kizzi Hudson-Roberts and Chris McComb travelled from Brighton this morning but missed the excitement by a few minutes.
Having watched television footage last night, the euphoria in the capital made them make the trip today and they took their baby son Mason, just seven weeks old.
Ms Hudson-Roberts said: "We went to Buckingham Palace and queued up to see the notice.
"We hoped we'd get here on time."
She thought it was "brilliant" that William drove his wife and baby home, and Mr McComb agreed, saying: "That's tradition, to drive the lady home."
With the "Great Kate Wait" now over, the cramped press pens outside the Lindo Wing have started to become more sparse and journalists are preparing to leave.
Their work here is done.