* "Lynne and I send you our warmest congratulations on the birth of a new Royal prince. As you already know the arrival of a new baby is another exciting and life-affirming event you no doubt will cherish. On behalf all Australians, we send your family our best wishes at this happy and special time." - Governor-general Peter Cosgrove

* "I am delighted to join with millions of Australians to send my sincere congratulations to the Duke and Duchess of Cambridge, Prince George and Princess Charlotte, as well as the wider royal family, on the birth of a new baby boy. This new addition to the family will be welcomed by the millions of Australians who hold a deep affection for our royal family." - Liberal senator Eric Abetz.

Australian Associated Press