Britain's Duke and Duchess of Cambridge will bring Prince George on tour with them to Australia and New Zealand.
The couple are set to break with royal tradition by travelling to the Commonwealth countries next April with their baby son, breaching protocol about direct heirs in line to the UK throne flying together.
A royal aide told The Mail on Sunday newspaper: "It's a long way to fly, and there's a cost implication if they travel separately. There's no suggestion of them taking separate flights."
Past generations of the royal family, including Queen Elizabeth, have always left their children at home with aides, but the tradition was broken when Prince Charles and his late wife Princess Diana took William with them to Australia in March 1983 when William was just nine months old.
William and Catherine will be overseas for a nearly month, spending around 10 days in each country. The trip marks the 31-year-old duchess' - formerly known as Kate Middleton - first official visit to Australia and New Zealand.
William, also 31, last flew Down Under in March 2011 to visit Christchurch shortly after the New Zealand city had been hit by an earthquake, before heading to the Australian states of Queensland and Victoria, which had been affected by floods.
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