The Duke of Cambridge marked his new role as president of the governing body for snorkelling and scuba diving - by taking a dip in a pool.
The piece was painted by Dan Llywelyn Hall, whose portrait of the Queen last year was criticised as looking like a Spitting Image puppet.
Prince William performed an impromptu rendition of Living On A Prayer with Jon Bon Jovi and pop star Taylor Swift.
The full list of 1,000 names of London's most influential people will be released tonight by the Evening Standard. These are the names that made it into the top 10.
- 1 Prince George
- 2 Boris Johnson, Mayor of London
- 3 Mark Carney, Bank of England Governor
- 4 David Cameron, Prime Minister
- 5 George Osborne, Chancellor
- 6 Theresa May, Home Secretary
- 7 Duchess of Cambridge
- 8 Andy Murray, tennis player
- 9 Ed Miliband, Labour leader
- 10 Sir Peter Hendy, Transport Commissioner
Prince George has been crowned the most influential person in London, in the Evening Standard's annual 'Power 1000 list'. The eight-week-old son of the Duke and Duchess of Cambridge was chosen because he has become the capital's biggest global ambassador.
The young Prince eclipsed Mayor Boris Johnson who topped the list of the most influential people in the capital a year ago.
A picture of the tricycle the Mayor of London revealed City Hall is giving to Prince George, has been obtained by ITV London.
Boris Johnson revealed that he gave a wedding present of a tandem Boris Bike to the Duke and Duchess of Cambridge today, after the London Mayor announced he was having a blue tricycle made for the new Prince George.
The town crier who announced the birth of the Prince of Cambridge has revealed he was "shocked" after international news channels described him as a royal official.
Tony Appleton's appearance in full costume at St Mary's Hospital in London was completely unannounced.
But his performance was so convincing that some reporters believed he was conducting an authorised role in proceedings.
In the US, CNN described him as "the royal crier delivering the royal news", while Fox News told viewers he was "the town crier making the official announcement".
Mr Appleton is a real town crier for Chelmsford, Bury St Edmunds and Romford - but not for central London - and had no prior discussions with Kensington Palace before he became the focus of world attention.
Mr Appleton said today: "I was planning this for two weeks like a military operation."I went to London with my uniform on and stayed in a hotel."
After receiving a tip-off from a journalist that the Duchess had given birth, he got in a taxi and asked the driver to drop him off at the entrance to the hospital.
"I stood on the pavement and did my proclamation. The press shouted at me to get on the steps."
Mr Appleton, 76, from Great Baddow, near Chelmsford, said "I was shocked" after discovering the media coverage of his announcement.
He has received phone calls from America, Japan, Dubai and Holland since the Royal birth on Monday.
"I'm on so many front pages," he added.
He insisted he did not tell anyone he was acting in an official capacity.
"I was there on my own steam," he said.
"I turned up to do the job and went away.
"It was a bit of fun and it told the world what had happened."
The Duke and Duchess of Cambridge have named their son HRH Prince George Alexander Louis of Cambridge.
Previous Georges who have become Britain's King are:
- George I - ruled August 1714 to June 1727
- George II - ruled June 1727 to October 1760
- George III - ruled October 1760 to January 1820
- George IV - ruled January 1820 to June 1830
- George V - ruled May 1910 to January 1936
- George VI - ruled December 1936 to February 1952
George VI was Queen Elizabeth II's father and George V was the Queen's grandfather.
In a statement, Kensington Palace said:
The Duke and Duchess of Cambridge are delighted to announce that they have named their son George Alexander Louis.
The baby will be known as His Royal Highness Prince George of Cambridge.
The Duke and Duchess of Cambridge have named their son George Alexander Louis, Kensington Palace said.
The Duke and Duchess of Cambridge will announce the name of their newborn baby shortly, ITV News understands.
The Duke and Duchess of Cambridge and their son have arrived at the Middleton family home in Bucklebury.