Will, Kate and the Royal Crier: When a Prince is born

Town crier Tony Appleton announces the news of the birth of Prince William and Catherine, Duchess of Cambridge's baby boy outside of the Lindo Wing of St Mary's Hospital in London. (AFP)

Tony Appleton, a town crier, announces the birth of the royal baby, outside St. Mary's Hospital exclusive Lindo Wing in London. (AP)

Town Crier Tony Appleton announces the birth of Prince William and Catherine Duchess of Cambridge's baby boy outside of the Lindo Wing of St Mary's Hospital in London. (AFP)

Town Crier Tony Appleton announces the birth of Prince William and Catherine Duchess of Cambridge's baby boy outside of the Lindo Wing of St Mary's Hospital in London. Prince William's wife Kate gave birth to a baby boy today, providing Britain's royal family with a future king in an event that had been anticipated around the world, Kensington palace said. (AFP)

Ed Perkins, a Buckingham Palace official hands the birth announcement to colleague in  a car to be driven to Buckingham Palace, outside St. Mary's Hospital exclusive Lindo Wing in London. Palace officials say Prince William's wife Kate has given birth to a baby boy. The baby was born at 4:24 p.m. and weighs 8 pounds 6 ounces.The infant will become third in line for the British throne after Prince Charles and William. (AP)

Ed Perkins, a Buckingham Palace official walks with the birth announcement to be taken to Buckingham Palace, outside St. Mary's Hospital exclusive Lindo Wing in London. (AP)

The Queen's Press Secretary Ailsa Anderson (L) with Badar Azim, a footman, place on an easel in the forecourt of Buckingham Palace a notification to announce. (AFP)

The waiting crowds cheer as the Queen's Press Secretary Ailsa Anderson with Badar Azim a footman place on an easel a notification announcing the birth of a baby boy, at 4.24pm to Prince William and Catherine, Duchess of Cambridge, at St Mary's Hospital. (AFP)

An easel stands in the forecourt of Buckingham Palace in London. (AFP)

File photo Britain's Prince William holds baby Sina Nuru in the new Winnicott Baby Unit at the St Mary's Hospital, in London. It was announced  on Monday, July 22, 2013, in London that Kate, Duchess of Cambridge and her husband Prince William, the Duke of Cambridge, gave birth to a boy weighting 8lbs  6 oz. (AP)

June 22, 1982, file photo, Britain's Prince Charles, Prince of Wales, and wife Princess Diana take home their newborn son Prince William, as they leave St. Mary's Hospital in London. It was announced. (AP)

June 22, 1982, file photo, Britain's Prince Charles, Prince of Wales, and wife Princess Diana take home their newborn son Prince William, as they leave St. Mary's Hospital in London. It was announced. (AP)