Kate Middleton and Prince William pose for their very first photos with their new baby son

Kate Middleton and Prince William have posed for their very first photographs with their new baby boy, just seven hours after the Duchess welcomed the new royal baby into the world.

Standing on the steps of the famous Lindo Wing in London, where the Duchess of Cambridge gave birth to the couple’s third child just earlier today, the proud parents looked thrilled to share their joy with the public and the world’s waiting media.

Bundled up in his mother’s arms, the new royal baby looked snug swaddled and sleeping in a warm blanket against the chilly April wind. Prince William and Kate smiled and waved for photographs, with Kate dressed in a red dress by one of her favourite designers, Jenny Packham.

duke and duchess of cambridge lindo wing kate and william new royal baby son

‘Delighted’ Prince William said emerging with his new son for the first time, ‘Very happy.’

‘Thrice the worry now,’ the father of three also quipped, holding up three fingers. ‘We didn’t keep you waiting too long this time’ he added.

Just before Kate emerged from the Lindo Wing for the first time since the birth of her second son, the couple’s children Prince George and Princess Charlotte had met their new baby brother for the first time.

Royal baby Prince George Princess Charlotte

A natural in front of the camera, little Princess Charlotte – who turns three next week – waved at the waiting crowds, while her shyer big brother Prince George clutched Prince William’s hand as he was led into the hospital to meet his new younger sibling.

After Prince George and Princess Charlotte returned home to Kensington Palace, the Duke and Duchess of Cambridge publicly shared their gratitude to the staff of St Mary’s hospital in Paddington for ‘the care and treatment’ they received during Kate’s pregnancy and birth of her third child.

Kensington Palace also tweeted on the couple’s behalf how thankful they are for the public’s warm wishes after the birth of their new son.

‘Their Royal Highnesses would like to thank all staff at the hospital for the care and treatment they have received’ the Palace tweeted. ‘They would also like to thank everyone for their warm wishes.’

Kate and Prince William will now return to Kensington Palace with their new baby boy, where they will spend time at home as a family of five for the very first time.