Prince William, Kate Middleton and Prince George's Tour Down Under: A Look Back at Prince Charles and Princess Diana's Trip

7-month-old royal will make his first public appearance during an event for new parents and their babies in Wellington

Prince William, Kate Middleton and Prince George are heading Down Under.

The Duke and Duchess of Cambridge, as well as their 7-month-old son, will travel to Australia and New Zealand for a three-week tour. Prince William and Kate will bring the tiny royal, his first public appearance since his christening, to an event for new parents and their babies.

The trip will commence on April 7 in Wellington and will end on April 25 in Canberra.

Queen Elizabeth II gave her approval for Prince William and Prince George to travel together because normally two heirs do not typically travel on the same aircraft.

The longtime monarch granted the same permission to Prince Charles and Princess Diana, who broke royal protocol when they brought their then 9-month-old son to Australia and New Zealand in 1983. It was also an unconventional decision by Charles and Diana given William's age to bring him out of the country.

This upcoming overseas tour for Kate will be her first as a mother, just as it was for Princess Diana more than thirty years ago.

During their trip, Charles and Diana were photographed as they visited the Royal Botanical Gardens in Melbourne.

The couple also shared a kiss as Prince Charles participated in a Polo match in Melbourne.