The newborn royal baby, driven by his father the Duke of Cambridge, has arrived home to Kensington Palace.
The Duke and Duchess of Cambridge have appeared outside the Lindo Wing at St Mary's Hospital with their new son.
Kate gave birth to the boy at 4.24pm yesterday.
The couple and the child will now travel home to Kensington Palace after Prince William makes some brief remarks to the gathered media.
The Duchess of Cambridge looked radiant as she presented her son to the world in a pale blue polka dot dress reminiscent of the pattern worn by Princess Diana on the day she left hospital with Prince William.
Kate stepped out of the Lindo Wing wearing a bespoke piece by Jenny Packham, a couturier who has become something of a household name thanks to the Duchess.
Observers were quick to draw parallels with the outfit worn by William's late mother when she posed on the same doorstep with her first-born son in a green spotted dress.
But where Diana appeared nervous and bewildered by the attention, a glowing Kate smiled broadly and spoke assuredly as she introduced her child to the world's press and the hordes of cheering well-wishers.
The bells of Westminster Abbey sounded out in celebration of the royal birth.
Three of the bell ringers performing the task did the same for the new Prince's father more than 30 years ago.
When the Duke of Cambridge was born in June 1982, Clarke Walters helped ring a peal at the gothic church in central London in honour of the newest member of the royal family.
Mr Walters said it was "wonderful" to now be performing the peal for William's own baby son.
He also rang the celebratory bells for the Duke and Duchess of Cambridge's wedding at the Abbey two years ago.
A team of 10 from the Westminster Abbey Company of Ringers began ringing a full peal on the Abbey's 10 bells at 2pm to coincide with a gun salute in Green Park.
The complex peal is made of 5,000 thousand changes and known as the Cambridge Surprise Royal and lasts for over three hours.
Gun salutes have sounded across central London today to mark the birth of the Prince of Cambridge.
A 62-gun salute took place from Gun Wharf at the Tower of London.
Meanwhile, the King's Troop Royal Horse Artillery, fired 41 shots from six WWI-era 13-pounder field guns at Green Park.
Gun salutes will shortly sound across London to mark the birth of the royal baby.
The King's Troop Royal Horse Artillery and the Honourable Artillery Company will both carry out the ceremonial salutes in honour of the new addition to the Royal Family.
Guardsman at Buckingham Palace have played Congratulations during The Changing of the Guard today, to mark the birth of the Duke and Duchess of Cambridge's son.